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The basic volcanic rock gas reservoir in Xushen gas field is controlled by volcanic bodies, and the reservoir has the characteristics of poor horizontal continuity, thin vertical thickness, and small planar development range. Part of the volcanic bodies No. 7, No. 10, and No. 15 are developed within the confirmed boundary of Block X23. There is only one well, namely X23, on the No. 10 volcanic body within the boundary, and the lack of well data makes it difficult to integrate geological engineering modeling. To this end, the actual drilling on the three volcanic bodies outside the block boundary was all included in the research area, and the basic volcanic rock gas reservoir structure modeling, attribute modeling, fracture modeling, and stress modeling were carried out through the combination of well and seismic control, forming a geological engineering integrated modeling technology that combines single and composite modeling, and integrates multiple information. When the well is deployed inside a single volcanic body, the single geological model is mainly used, When the well is deployed at the contact area of the volcanic body, the composite model is mainly used. The integrated model can guide well deployment and drilling guidance, making well deployment more scientific and reasonable, drilling guidance more accurate, and improving reservoir drilling rate from multiple angles. The pilot test well P1 has a reservoir drilling rate of 73.6%, which is 27.1 percentage points higher than the average. The integrated model can also guide the design of fracturing schemes and improve the fracturing effect. A total of 40 clusters were fractured in the P1 well, with 35-38 clusters opened and an opening rate of 87.5% -95%. The fracturing effect is significant. The integrated modeling technology of geological engineering has achieved good application results in the development of basic volcanic gas reservoirs in Block X23. The initial daily production of P1 well was 120000 cubic meters/day, which is 3-4 times that of similar gas wells. This research approach can be borrowed from other medium basic volcanic gas reservoirs to improve the development efficiency of gas reservoirs.
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