Method for predicting low-porosity and low-permeability clasolite effective reservoir at high-diagenesis stage
A diagenetic stage and clastic rock technology is applied in the field of predicting effective clastic rock reservoirs with low porosity and low permeability in the high diagenetic stage, and can solve the problem that the development of the reservoir cannot be reflected well, the prediction results are not ideal, and the oil and gas exploration and development are affected. And other issues
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[0083] The present invention will be further described below by way of examples.
[0084] The Shanxi Formation in the Ordos Basin is a low-porosity and low-permeability reservoir with strong diagenesis. It is divided into two sections. The depositional environment and lithology of different formation sections are different. The distribution of effective reservoirs is also different. Apply the technical solution of the invention to predict the distribution of effective reservoirs in the area.
[0085] 1. Geological data collection.
[0086] The following geological data in this area were collected:
[0087] (1) The stratigraphic sequence of the Upper Paleozoic and above in the Ordos Basin and the duration of each geological age;
[0088] (2) Layered data of 200 exploration wells in the Ordos Basin that encountered the Upper Paleozoic;
[0089] (3) Sedimentary facies types and distribution maps of each section of the Shanxi Formation and Shipenzi Formation in 200 Upper Paleo...
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