吴起王洼子地区长9致密砂岩油藏成藏条件及勘探突破  

Reservoir forming conditions and exploration breakthrough of tight sandstone of Chang 9 member in Wangwazi area, Wuqi County

作　　者：庞军刚[1] 王桂成[1] 石勇[2] 李赛[1] 朱鹏辉[1] 

机构地区：[1]西安石油大学地球科学与工程学院,西安710065 [2]延长油田股份有限公司下寺湾采油厂,陕西延安100024

出　　处：《岩性油气藏》2015年第1期32-38,43,共8页Lithologic Reservoirs

基　　金：国家重大科技专项"鄂尔多斯盆地大型低渗透地层油气藏开发示范工程"(编号:2011ZX05044);陕西省教育厅科研计划项目"坳陷湖盆几种事件性沉积耦合关系"(编号:2013JK0844)联合资助

摘　　要：近年来,鄂尔多斯盆地石油勘探在延长组下组合长9油层组获得了新发现,但对该致密油藏的研究仍处于起步阶段,认识的不足严重制约了致密油藏勘探开发。根据钻井、测井及分析测试资料,对王洼子地区长9致密砂岩油藏成藏条件进行了分析,探讨了油藏富集规律及其勘探潜力。研究表明,该区长9油层组具有较好的成藏条件,长91和长93已见多口高产井,石油勘探已有较大的突破。烃源岩、沉积微相、优质砂体、鼻状隆起等几个因素的优化匹配是长9致密砂岩油藏勘探能够取得突破的关键。据综合分析,洼4井区及洼14—洼11井区成藏条件较好,为下一步的有利勘探区。New discovery has been achieved in tight sandstone in the exploration of lower assemblage of Chang 9 member of Yanchang Formation in Ordos Basin. But the research of tight reservoir is still in the initial stage, and the lack of awareness seriously restrict the exploration and exploitation of tight reservoir. According to the data of well logging, well drilling and laboratory test, this paper discussed the forming condition, enrichment rule and exploration potential of the tight sandstone reservoir of Chang 9 member in Wangwazi area. The result shows that Chang 9 oil reservoir set has good reservoir forming conditions, several high-production wells have been found in Chang 91 and Chang 93 strata, and it has great breakthrough of petroleum exploration. The hydrocarbon source rocks, sedimentary microfacies, high quality sand bodies, nose-shaped structure are the key for exploration breakthrough of the tight sandstone reservoir of Chang 9 member. Based on comprehensive analysis, Wa 4, Wa 14 and Wa 11 well fields are favorable areas for further exploration.

关 键 词：长9油层组 延长组下组合 致密砂岩油藏 王洼子地区 鄂尔多斯盆地 

分 类 号：TE122.3[石油与天然气工程—油气勘探]