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Li P.-J.,Northeast Petroleum University | Li P.-J.,Heilongjiang Oil and Gas Reservoir Forming Mechanism and Resource Evaluation Key Laboratory | Luan Z.-Y.,Northeast Petroleum University | Chen H.-A.,Northeast Petroleum University | Gu Y.-F.,Northeast Petroleum University
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2013

In order to improve the application effect of the NMR in Petroleum exploration and development, the quality of T2 spectrum inversion needs to be controlled. Based on the inversion theory of M-P Generalized Inverse, echo resolution matrix, T2 spectrum resolution matrix are deduced, the quality control indices of T2 spectrum inversion are provided: the stretch coefficient, maximum, minimum, average and range of principal diagonal elements of resolution matrix. Calculating the inversion quality control indices under different observation modes, choosing the observation mode of resolution matrix approximate to unit matrix for data acquisition can improve T2 spectrum inversion quality, thus to control inversion quality. Numerical experimentation indicates that there is very good consistency between inversion quality and its control index. Hence, the method may direct the design before NMR data acquisition, control inversion quality of T2 spectrum and lay a foundation for improving the effect of NMR geological application. Source


Fu G.,Northeast Petroleum University | Fu G.,Heilongjiang Oil and Gas Reservoir Forming Mechanism and Resource Evaluation Key Laboratory | Sun T.,Northeast Petroleum University | Sun T.,Heilongjiang Oil and Gas Reservoir Forming Mechanism and Resource Evaluation Key Laboratory | And 2 more authors.
Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology | Year: 2014

Fault-sandstone lateral transporting is a bottleneck in the hydrocarbon exploration in Nanpu depression. To clarify the conditions and ability of lateral transporting from oil source fault to both sides of reservoir, the boundaries of the reservoir connectivity and favorable fault-sandstone configuration has been determined by the data from 274 prospect-evaluation wells and three-dimensional seismic data, and concludes that the advantages fault-sandstone lateral transporting of hydrocarbon in Nanpu depression are as follows: 1) the oil source fault which was moved and opened in accumulation period as vertical conduit; 2) high-quality capping layer existing in the upper part; 3) fault-sandstone configuration type being antithetic fault (hanging wall) or synthetic fault (footwall); and 4) the formation sand ratio greater than 20%, that is, with good physical properties and reservoir connectivity. Based on this, this study proposed the fault-sandstone configuration lateral transporting hydrocarbon capacity evaluation index (T), and this evaluation index was used to evaluate the hydrocarbon lateral transporting ability of 83 fault-sandstone configuration of middle and shallow strata of Nanpu depression in 16 wells. The results show that: when fault-sandstone configuration lateral transporting hydrocarbon capacity evaluation index is bigger than 2, it is favorable for hydrocarbon lateral migration from fault to sandstone. Test result of NP1-5 well actual example indicates that the method is practical to study hydrocarbon lateral transporting ability of fault-sandstone configuration lateral transporting hydrocarbon. Source


Sun T.-W.,Northeast Petroleum University | Sun T.-W.,Heilongjiang Oil and Gas Reservoir Forming Mechanism and Resource Evaluation Key Laboratory | Fu G.,Northeast Petroleum University | Fu G.,Heilongjiang Oil and Gas Reservoir Forming Mechanism and Resource Evaluation Key Laboratory | And 8 more authors.
Natural Gas Geoscience | Year: 2014

To pinpoint the location of reservoir near fault, the work of dominant migration pathway of oil source faults and vertical sealing capability of caprock after broken by fault was carried out to study main controlling factors for horizontal and vertical hydrocarbon accumulation in middle-shallow layer of 1st structure, Nanpu Sag. The results show that: (1)effective fault plane ridge of oil source fault is the dominant migration pathway, which controlled lateral hydrocarbon enrichment site. The major oil and gas reserves in middle-shallow layers of 1st structure of Nanpu Sag, are located near the effective fault plane ridge; (2)vertical sealing capability of volcanic rock(brittle)caprock after broken by fault can be evaluated by the relict effective thickness of caprock(H'), and the threshold value(Ho)of NgIII volcanic caprock in vertical hydrocarbon sealing is about 79-93m. In the 1st structure of Nanpu sag, hydrocarbon mainly accumulates at the bottom of the caprock when H'>Ho, and the sealing ability of caprock is limited when H'>Ho. Leakage of hydrocarbon exist both above and below the caprock, so the relict effective thickness of caprock controls the layers where hydrocarbon transports and accumulates vertically. Integrate the above two aspects, we can quickly determine a three-dimensional favorable area where hydrocarbon accumulated near fault, which reduce the risk of exploration. Source


Hao Z.,Heilongjiang Oil and Gas Reservoir Forming Mechanism and Resource Evaluation Key Laboratory | Zhang Y.,Heilongjiang Oil and Gas Reservoir Forming Mechanism and Resource Evaluation Key Laboratory | Liu Z.,Heilongjiang Oil and Gas Reservoir Forming Mechanism and Resource Evaluation Key Laboratory | Yuan H.,Heilongjiang Oil and Gas Reservoir Forming Mechanism and Resource Evaluation Key Laboratory | Huang P.,Heilongjiang Oil and Gas Reservoir Forming Mechanism and Resource Evaluation Key Laboratory
Scientia Geologica Sinica | Year: 2014

The fault segmentation of blank area in the east of Pubei oilfield is strong, and the distribution of oil and water is complex. In view of this kind of situation, we did sedimentary microfacies research in study area by well seismic combination method. First, we established isochronous stratigraphic framework of the east of Putaohua oil layer by core and logging data, we also established six well logging facies models, including main underwater distributary channel, underwater distributary channel, edge of underwater distributary channel, main sand sheet, sand sheet and bay mud between distributary channels; Secondly, we described the sedimentary microfacies of development area, summarized the evolution of sand and sedimentary microfacies characteristics of Putaohua oil layer, and drew the sedimentary microfacies of study area by well seismic combination method; Finally, on the basis of the above work, we study the affect of the match of fault and sand in oil accumulation model. It shows that the match of fault and sand is the main factor in oil accumulation, the wells controlled by fault with high angel in the structural high position have better test conclusions. The study provides geological basis for the next step of exploration and development in oil field. ©, 2014, Science Press. All right reserved. Source

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