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塔里木盆地哈拉哈塘地区已建成碳酸盐岩百万吨级油田。然而北部潜山岩溶带油气成藏关键因素不明,油气勘探开发一体化程度滞缓。通过将研究区邻区顺层岩溶带建产区块的油气高效成藏关键因素进行差异性对比分析,提出潜山岩溶带奥陶系一间房组—鹰山组岩溶风化壳缝洞型储层上覆志留系柯坪塔格组上二亚段致密砂泥岩互层段直接盖层是该区油气大面积富集成藏的关键因素;利用高保真地震资料,查明了潜山岩溶带南部边界—奥陶系吐木休克组尖灭线、盖层分布特征并落实岩溶缝洞圈闭,有效地指导了钻探部署。
The Tarim Basin Halahatang area has been completed carbonate million tons of oil fields. However, the key factor of hydrocarbon accumulation in the northern buried hill karst is unknown, and the degree of integration of oil and gas exploration and development is slow. Based on the contrast analysis of the key factors of high-efficient hydrocarbon accumulation in the karst belt in the adjacent karst belt of the study area, it is proposed that the karst weathering crust-cave reservoir of the Ordovician Yijianfang Formation-Yingshan Formation in the buried hill The direct caprock of the tight sandstone and mudstone interlayered in the Upper Member 2 of the Upper Permian Silurian in the Kepingtage Formation is the key factor for large-area hydrocarbon accumulation in the area. Based on the high-fidelity seismic data, the buried karst The southern boundary - the extinction line and caprock of the Ordovician Tumen Shike Formation and the implementation of karst cave-trap traps, effectively guide the drilling deployment.