泌阳凹陷王集地区油气差异分布及控制因素

Differential hydrocarbon distribution and its controlling factors of Wangji Area in Biyang Sag

 李磊¹ 王克杰¹ 李连生² 杨云飞¹ 张永华¹ 曲洁¹

中国石化河南油田分公司勘探开发研究院，河南 郑州 450046 中国石化河南油田分公司油气勘探管理部，河南 南阳 473132）

Research Institute of Exploration and Development, Henan Oilfield Company, SINOPEC, Zhengzhou 450046, China Oil and Gas Exploration Management Department, Henan Oilfield Company, SINOPEC, Nanyang 473132, China)

 泌阳凹陷王集地区是一个两翼相对宽缓的不对称鼻状构造，向深凹区倾没，与砂体耦合发育，是油气运移的有利指向区。新采集处理的开发地震资料精细解析发现：北东向主控断层平面分布的分段性和纵向发育的分期性及与不同规模砂体的配置，控制了王集地区不同区块油气富集程度有差异、不同构造位置油气藏类型有差异及不同层段的油气富集也有差异。以此指导该区井位部署，发现了B166-1，C50等井区油气富集区块，并扩大了W20井区含油面积，新增地质储量476.56×104 t。

 Wangji Area in Biyang Sag, an asymmetric nose structure with two wide and low-amplitude flanks, which is inclined and gradually disappeared towards the deep sag and coupled with sand body development, therefore, is a good place with favorable hydrocarbon migration. The newly acquired seismic data fine interpretation reveals that the sand bodies configuration with different scales between the segmentation characteristic on horizontal distribution and the sub-stage characteristic on vertical development of the primary NE faults mainly controls the hydrocarbon enrichment degrees in different blocks. Besides that, differential hydrocarbon distribution also occurs in hydrocarbon reservoir types with different structure positions and the hydrocarbon enrichment is varied at different intervals. On the basis of these, it is discovered that Bi 166-1 and Chai 50 well blocks are hydrocarbon enriched blocks and the oil-bearing area of Wang 20 well block is enlarged with increased extra OOIP of 476.56×104 t.

10.6056/dkyqt201605006