Geological Scientific Research Institute of Shengli Oilfield

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Geological Scientific Research Institute of Shengli Oilfield

China

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Zhang S.,China University of Petroleum - East China | Chen S.-Y.,China University of Petroleum - East China | Wu Z.-P.,China University of Petroleum - East China | Wang Y.-S.,Geophysical Research Institute of Shengli Oilfield | And 3 more authors.
Geology in China | Year: 2015

The sedimentary rocks from Kongdian Formation to the early period of the fourth member of Shahejie Formation in the western part of the south slope of Dongying Depression consist of a set of red beds mainly comprising red terrestrial clastic Sediments. Based on an analysis of applicability of erosion thickness with different restoration methods and a comparative evaluation of different methods for restoring erosion thickness, the authors have found that the tectonic cross section method can be mainly used to define the erosion thickness interval and eroding range of calibration, the mudstone acoustic time and deposition rate method is suitable for the identification of the numerical interval of erosion thickness, the acoustic interval transit time method is better than other methods in the area near the uplifted block of Linnan fault and Gaoqingpingnan fault, the optimization deposition rate method is better than other methods in Pingfangwang area, and the optimized porosity method is more accurate in the red layers, especially in the lower member of BS4 formation. The results from inclusion thermometry testing method and vitrinite reflectance method can only be regarded as the single well data points for reference.


Jiang Z.,Geological Scientific Research Institute of Shengli Oilfield | Huang G.,Sichuan University
Journal of Dispersion Science and Technology | Year: 2014

Partially cross-linked polyacrylamides (PCPAM) were prepared, and their rheological property, gel content, swelling property, and suspension property in saline solution were analyzed in laboratory. The goal of the research was to study the flow mechanism of PCPAM as a novel oil displacement agent in porous media. The migration behaviors of PCPAM were studied by single and series connection of double-tube sandpacked core flow experiments. The results showed that there was a critical pressure existing in the migration of PCPAM particles in porous media, and the migration was a dynamic process of plugging and flooding at the same time. When the pressure reached the critical pressure, the PCPAM particles would deform to pass through the pore throat and go ahead. Besides, the profile control experiments were conducted using a parallel connection of double-tube sandpacked core models, and the results revealed that PCPAM could generate "fluid diversion" and enlarge the swept volume of the lower permeable core. Moreover, micro-visualization displacement experiments were also carried out and proved that PCPAM could plug the high permeable pore throat to enlarge the swept volume, leading to an enhancement in oil recovery. © 2014 Copyright Taylor & Francis Group, LLC.


Yang P.-J.,Geological Scientific Research Institute of Shengli Oilfield | Yang P.-J.,China University of Petroleum - East China | Pan Y.,Downhole Service Company of Shengli Oilfield | Mu X.,Geological Scientific Research Institute of Shengli Oilfield | Ren X.-D.,Gudao Oil Production Plant of Shengli Oilfield
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2010

The method of high-order statistics seismic wavelet extraction requires reflection coefficient to be non-gauss white noise and its extraction speed is slow. In order to overcome the shortcomings, a novel mixed-phase seismic wavelet extraction method for single input multiple output(SIMO)system by subspace method was presented. Quadratic objective function was built based on the orthogonality between a signal and a noise subspaces, and the seismic wavelets were extracted by optimizing the objective function. The reflection coefficient need not be made any assumption. So this method is totally different from high-order statistics wavelet extraction. The results of numerical simulation and application show that this method is characterized by high accuracy and good stability, and it is very suitable for the areas without well materials or reliable well materials. This method has wide application perspects.


Cai G.,Guangzhou Marine Geological Survey | Cai G.,CAS Guangzhou Institute of Geochemistry | Guo F.,CAS Guangzhou Institute of Geochemistry | Liu X.,Geological Scientific Research Institute of Shengli Oilfield | Sui S.,Geological Scientific Research Institute of Shengli Oilfield
Geochemical Journal | Year: 2011

Major, trace element and Sr-Nd isotopic compositions of Cenozoic sedimentary rocks from the Dongying Sag and the Zhanhua Sag, Jiyang Depression, provide evidence for provenance evolution and paleogeographic reconstruction. Compared with the average composition of post-Archean Australian shales (PAAS), the Paleogene sedimentary rocks of Shahejie formation (Es) from the Dongying Sag have similar SiO2, Al2O3 contents, lower K2O, Na2O contents with K2O/Na2O ranging from 0.18 to 4.58, relatively lower contents of V, Cr, Co, Ni, Nb, Ta, Y, Rb, and Cs, and higher contents of Sr, Ba, Zr and Hf. All samples show chondrite-normalized REE patterns similar to that of PAAS, with significant light REE enrichment, flat heavy REE and negative Eu anomalies (Eu/Eu * = 0.71-0.99, average of 0.80). The Sr-Nd isotopic compositions of the Paleogene sedimentary rocks are different from those of the Neogene sedimentary rocks which generally have higher 87Sr/ 86Sr and lower 143Nd/144Nd. In the geochemical discrimination diagrams (e.g., La/Th-Hf, La-Th-Sc, and Th-Hf-Co), the studied samples were plotted in the area of felsic rocks rather than mafic rocks, which indicated that the source rocks are mainly composed of post-Archean felsic igneous rocks and recycled sedimentary rocks. This is also supported by interelement ratios such as La/Co, La/Th, Th/Co, and Th/Cr. The Sr-Nd isotopic compositions vary from the Paleogene to Neogene sedimentary rocks further suggesting a change in provenance, during which contemporaneous volcanic lava supplied some clasts with higher 143Nd/144Nd and lower 87Sr/86Sr ratios for deposition of Paleogene Es sedimentary rocks, whereas the contribution of volcanic detritus became much less during the Neogene time. The geochemistry of sedimentary rocks from the Jiyang depression possibly implies that the Paleozoic sedimentary rocks covering the old metamorphic crystalline basement rocks may not be totally denuded at the surrounding uplifts and highs during the Paleogene time. Copyright © 2011 by The Geochemical Society of Japan. +.


Wang J.,Geological Scientific Research Institute of Shengli Oilfield | Li S.H.,Yangtze University | Shi F.L.,Coal Mine Exploration of Guizhou Province | Hu X.L.,Yangtze University
Advanced Materials Research | Year: 2013

Es2 8th sand group in Shengtuo oilfield is a typical braided river delta front deposition. Through depositional physical simulation, the development mode of mouth bar and its main controlling factors were summarized. Physical model and experiment scheme were set up according to similarity criterion and the depositional background in research area. One provenance and three times simulation was designed to simulate three single layers within Es2 8th sand group respectively. Development mode of mouth bar was summarized with three single mouth bars based on swing conditions of rivel estuary and two composite mouth bars according to whether they are developed at the same time. © (2013) Trans Tech Publications, Switzerland.


Wan T.,China University of Petroleum - East China | Jiang Y.-L.,China University of Petroleum - East China | Lin H.-X.,Geological Scientific Research Institute of Shengli Oilfield | Peng C.-S.,Geological Scientific Research Institute of Shengli Oilfield | Bi C.-Q.,Geological Scientific Research Institute of Shengli Oilfield
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2010

Based on the data of geological logging, core mercury injection test and formation test, the quantitative analysis on the main controlling factors of hydrocarbon accumulation and enrichment in the southern slope of Chexi sag was studied by using technologies of quantitative evaluation of fault-activity and fault-seal, rock thin section analysis and reconstructed paleo pressure by basin modeling. The following are the conditions of fault-seal formation: The hydrocarbon accumulation degree and macroscopic distribution of reservoir upper source rock were controlled by the source faults' activity time and site of Guantao formation. Clay smear potential is more than 22, and shale smear factor is less than 1.5, and smear gouge ratio is more than 0.73. The bottom of Sha 2 member, Sha 3 and Sha 4 upper subinterval match the conditions. The hydrocarbon accumulation of reservoir under source rock is controlled by pore throat radius of reservoir and surplus pressure in the bottom of Sha 3 member during the period of reservoir formation. Favorable reservoir of Sha 4 upper subinterval is located in the area where the pore throat radius is more than 0.24μm and the buried depth of reservoir is less than 4 km and favorable sedimentary facies belt develops. Near the boundary of reservoir under source rock, surplus pressure and reservoir displacement pressure limitation in the phase of reservoir-forming are matched. Based on this, it can be predicted that the probable oil domain of reservoir under source rock is the stratum of late Minghuazhen formation sedimentary period (2 Ma before present) in the bottom of Sha 3 member whose surplus pressure is higher than 0.6 MPa.


Sui F.-G.,Geological Scientific Research Institute of Shengli Oilfield | Song G.-Q.,Geological Scientific Research Institute of Shengli Oilfield | Zhao L.-Q.,Geological Scientific Research Institute of Shengli Oilfield | Wang X.-J.,Geological Scientific Research Institute of Shengli Oilfield
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2010

Based on the geologic characteristics of unconformity structure in Jiyang depression and the oil and gas transportation process of hydrocarbon reservoir for the found formation, oil and gas transportation way and ability of unconformity were analyzed. The results show that unconformity structure layers with different characteristic are mainly composed of sand and mudstone in continental rifted basin. Sand-mud combination of unconformity surface can be divided into four kinds of types: sand/sand, sand/mud, mud/sand and mud/mud. Their distributions have some regularities in the plane. Different combination type controls transportation way of oil and gas of unconformity, in which sand/sand type controls the vertical way, sand/mud, mud/sand types control the horizontal way. As a result of facies fast changing and non-permeable of mudstone both before and after weathering in rifted basin, poor horizontal continuity of permeable formation of unconformity structure seriously limits horizontal oil and gas transportation extent of unconformity. It is important to particularly concern matching between unconformity structural type and fault, cage sand body for forcasting stratigraphic reservoir with ulterior trap-source distance.


Jiang Z.,Geological Scientific Research Institute of Shengli Oilfield | Cao X.,Geological Scientific Research Institute of Shengli Oilfield | Li Z.,Geological Scientific Research Institute of Shengli Oilfield | Guo L.,Geological Scientific Research Institute of Shengli Oilfield
Journal of Petroleum Exploration and Production Technology | Year: 2016

Polyacrylamide (PAM) hydrogel filled with different types and contents of hydrophilic silica was synthesized by in situ polymerization. Rheological behaviors of the hydrogels were measured with an oscillation rheometer. The results indicated that the addition of silica efficiently improved the mechanical properties of the hydrogel, both for the uncrosslinked system and crosslinked system; simultaneously, the storage modulus (G′), loss tangent (tanδ) and viscosity (η) of the hydrogel were obtained. These results suggest that a nonbonded complexation existed between the silica and the molecular chains of PAM that endowed the hydrogel with special behaviors. Results from Fourier Transform infrared spectroscopy (FTIR) showed that the action of the nonbonded complexation was derived from hydrogen bonds between hydroxyl groups of silica and amide groups of PAM. The formed secondary networks endowed the hydrogels with high mechanical properties. © 2015, The Author(s).

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