Exploration and Production Research Institute

Henan’an, China

Exploration and Production Research Institute

Henan’an, China
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Cheng Y.,Henan University | Zhao M.,Exploration and Production Research Institute | Zheng C.,Henan University | Guo S.,Henan University | And 2 more authors.
Energy and Fuels | Year: 2017

2-acrylamido-2-methyl-1-propanesulfonic acid sodium (AMPS) was grafted onto the surface of reactive nanosilica (RNS-D) by free radical polymerization to afford RNR-D/PAMPS inorganic-polymer nanohybrid with good water dispersibility, which can serve as a potential oil displacement agent for enhanced oil recovery. The RNS-D/PAMPS nanoparticles were characterized by transmission electron microscopy and Fourier transform infrared spectrometry, and the oil displacement performance of the RNS-D/PAMPS nanohybrid solution was evaluated by static and dynamic oil displacement tests. Results showed that the RNS-D/PAMPS nanohybrid as the potential oil displacement agent could obviously reduce the interfacial tension between crude oil and water, increase the hydrophilicity of rock surface, and dramatically decrease the adhesion work of crude oil and rock. When the RNS-D/PAMPS solution is introduced at a mass fraction of 5.0% under static and dynamic oil displacement tests, the tested crude oil can be recovered at a total rate of up to 87.67% and 92.86%, respectively, showing promising potential in enhanced oil recovery. © 2017 American Chemical Society.

Zhao F.-L.,China University of Petroleum - Beijing | Hou J.-R.,China University of Petroleum - Beijing | Li H.-S.,Exploration and Production Research Institute | Zhuang X.-C.,China University of Petroleum - Beijing
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2010

Taking Henan Xia'ermen Oilfield as an example and using vertically heterogeneous physical models with different permeability ratio, laboratory experiments were done to determine the feasibility of secondary polymer flooding and optimize the polymer mass concentration through investigating the profile control and flooding effects. The results show that 5%-8% of improved oil recovery efficiency was obtained, which demonstrates that the reservoir heterogeneity was improved to some extend. The mass concentration of polymer for secondary polymer flooding could not be lower than 2.2 g/L under setting experimental conditions. The results provide not only important basic parameters and theoretical foundation, but also new thinking for development of improved oil recovery technologies after polymer flooding.

Tang X.-M.,Exploration and Production Research Institute
Wutan Huatan Jisuan Jishu | Year: 2013

Since all the seismic exploration projects start from the obtaining of geologic data and end in archiving geologic data, It is a very important to edit, check and archive these data correctly. These jobs become more and more demanding as the amount of these data becomes larger and larger with the shortening of production circle of seismic exploration and the developments of the technology in geophysical prospecting. It is becoming relatively easier for the archive after the uniform format has been implemented. However, error-checking becomes tedious and inefficiency. This paper tries to deal with this issue using computer programs, for instance, we can eliminate common typeset errors in word documents in batch using a-nalysis principles of word xml format. The effect of this method turns to be great as ifs tested in real work.

Guo X.,Dagang Oilfield Company | Yang J.,Dagang Oilfield Company | Chen S.,Exploration and Production Research Institute | Li Q.,Petrochina | And 2 more authors.
Well Testing | Year: 2013

Buried hill formation in Dagang Oilfield has features of high temperature, being easy to leak, high-yield, high hydrogen sulfide content, so, it has high security risks in the process of testing oil, and high technical content. After several years of continuous research and exploration, an integrated test string of perforation-acid pressure-test has been designed, anti-hydrogen sulfide countermeasures are developed, and acid fracturing liquid system and process methods for Dagang buried hill features have been formed. At present, this kind of test oil technology is being matured, and set of test tech for high content of hydrogen sulfide has been developed which are applied in 3 wells on site, the technical indicators are completed successful, and yield gas flows are gained.

Lin J.-S.,Chengdu Center | Xie Y.,Chengdu Center | Liu J.-Q.,Chengdu Center | Zhao Z.,Chengdu Center | And 2 more authors.
Geological Bulletin of China | Year: 2012

Based on a study of such organic geochemical characteristics of hydrocarbon source rocks in northern Guizhou as organic carbon, isoprenoid alkenes and terpanes, the authors have found that they have the following characteristics: (1) TOC > 3%, and its longitudinal distribution is stable; (2) the value of S/TOC is very high, with an average of 0.1; (3) the Pr/Ph ratio is lower than 1.0, which shows an obvious dominance of phytane in isoprenoids; (4) the gammacerane index is higher than 0.15; (5) the δ13Corg is lower than -30‰; (6) the Ts/(Tm+Ts) ratio ranges from 0.361 to 0.518, with an average of 0.455. These characteristics indicate abundant sources of organic matter and a reduction environment. Furthermore, a comparison between lithological and organic geochemical profiles in different areas shows that the preservation condition in the late stage of Wufeng Period was better than that of the early stage, and that the upwelling was active in the middle stage of Wufeng Period.

Zhong J.-J.,Exploration and Production Research Institute | Li H.-K.,Exploration and Production Research Institute | Tang X.-M.,Exploration and Production Research Institute
Wutan Huatan Jisuan Jishu | Year: 2015

Observing system preferred demonstration is the most basic and important step in seismic acquisition design process. Designers usually obtained the polygon of boundary depending on the distribution of shots and receivers points or bin grid nodes with different fold number, and then calculate its area or internal point density and so on. It is more useful to map these boundary and projection them onto a variety of background image. You can only read point coordinates one by one and manually enter the coordinates sequence, which is time - consuming and laborious, for subsequent calculations, mapping and other operations when boundary shape is complex and there is no way to obtain the boundary coordinates. This article discusses how to calculate and automatically sort the point coordinates of boundary polygon in different case of a given set of points by equivalent tracing of rectangular grid data node, and then how to directly output available obstacle data format for the seismic acquisition design software to facilitate the design process. It is practical proved that method for calculating the boundary of point set can meet the needs of most of the theoretical design. The labour of hand outlining boundary and one by one reading boundary coordinate values is significantly reduced. Calculating and applications of boundary coordinates can be finished at the same time. It is greatly improved the accuracy of calculating the boundary coordinates and efficiency of acquisition program design.

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