Dagang Oil Field Company of Cnpc

Research Institute of Petroleum Exploration & Development, Dagang Oil Field of Cnpc

Wenzhong Han

Xiugang Pu

Xianzheng Zhao

Zhannan Shi

Wei Jun Zhang

Hu Wang

Lihong Zhou

Wenya Jiang

Fengming Jin

Xiongying Dong

Qun Luo

Dunqing Xiao

Jiapeng Wu

A shale brittleness sweet spot evaluation method is provided, comprising: determining a brittleness evaluation formula of shale brittleness indexes, shale mineral volume percent content and shale total organic matter mass percent content according to a shale volume-mass conversion formula and a brittleness calculation formula containing shale total organic matter volume percent content and the shale mineral volume percent content; drawing a shale brittleness grading chart of a research area target interval according to the brittleness evaluation formula and measured shale mineral volume percent content values and shale total organic matter mass percent content values of multiple shale samples of the research area target interval; and evaluating shale brittleness sweet spots of the research area target interval. By adopting the method, the shale brittleness sweet spots can be accurately and quantitatively recognized, shale exploration and development cost is reduced, and production capacities of gas-bearing shale formation are increased.

Shale brittleness sweet spot evaluation method

Embodiments of the present invention provide an oil-gas reservoir exploration method and apparatus and belong to the technical field of oil-gas exploration. The method includes: acquiring hydrocarbon source rock distribution, reservoir distribution, fault distribution and oil-gas reservoir distribution; determining at least one oil-gas accumulation chain according to the hydrocarbon source rock distribution, the reservoir distribution, the fault distribution and the oil-gas reservoir distribution; and determining exploration targets and an exploration order of oil-gas reservoirs according to the at least one oil-gas accumulation chain and the oil-gas reservoirs on the oil-gas accumulation chain. By using the oil-gas reservoir exploration method and apparatus, the exploration targets and the exploration order may be precisely and rapidly determined.

Oil-gas reservoir exploration method and apparatus

The present disclosure provide a method and device for optimal selection of fracturing stage clusters of continental shale oil horizontal well. The method includes: acquiring data information of a horizontal well to be fractured and data information of a key cored well; constructing a fracturing cluster evaluation index for the horizontal well according to the data information of the horizontal well to be fractured and the data information of the key cored well; and determining distribution of fracturing clusters and perforated interval clusters using the fracturing cluster evaluation index in conjunction with a principle of differential construction of horizontal well clusters. With the method and the device provided by the embodiment of the present disclosure, the problems of waste of resources and poor effect of oil production by fracturing, caused by uniform or overly dense distribution of clusters are solved.

Method and apparatus for optimal selection of fracturing stage clusters of continental shale oil horizontal well

A method is disclosed for evaluating and predicting a shale oil enrichment area of a fault lacustrine basin, comprising: obtaining materials and key data; determining a source-reservoir configuration relationship according to a longitudinal superposition relationship of different types of rock in a lithology profile and establishing a single-well lithofacies model; in the single-well lithofacies model, using a dolomite-to-formation ratio and a TOC average value to form a dolomite-to-formation ratio contour map and a TOC contour map, and superposing the dolomite-to-formation ratio contour map, the TOC contour map and a source-reservoir configuration relationship plane distribution map to form a lithofacies plane distribution map; on the basis of the lithofacies plane distribution map, superposing a vitrinite reflectance contour map and a dolomite thickness contour map to obtain a corresponding evaluation and prediction map of the shale oil enrichment area of the fault lacustrine basin.

Method and device for evaluating and predicting a shale oil enrichment areas of fault lacustrine basins

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Tianjin, China

Wenzhong Han