CB油田C3块赤山组油藏水平井开发可行性研究及应用

Feasibility research and application of horizontal well development in K_2c reservoir of C3 Fault Block of Chenbao Oilfield

C3块赤山组(K2c)油藏是CB油田主力层系之一,由于其特殊的地质沉积特征,一直未实施水平井开发。为了改善赤山组油藏开发效果,提高油藏采收率,运用油藏精细描述技术,开展储层连通关系、非均质性、隔夹层及储层分布规律研究;研究C3块K2c与泰州组(K2t)不整合接触面渗流关系、串流对两套层系开发效果的影响,综合评价分析C3块K2c实施水平井开发调整的可行性;进行了水平井初步设计和选层设计,在2009年成功实施了K2c油藏第一口水平井C3块平12井。

K2c reservoir of C3 Fault Block is one of the main strata series of CB Oilfield. Due to its special sediment characteristics, the horizontal well development has not been applied. In order to improve the development effect and recovery of K2c reservoir, the reservoir communication, heterogeneity, interbed and distribution regularity of the reservoir were studied by using the fine reservoir description. It was studied the seepage relation between unconformity contact faces of K2c and K2 t of C3 Fault Block and the influence of streaming on the development, and the feasibility of horizontal well development was evaluated comprehensively. After horizontal well design and layer choice were completed, C3 P12 well, the first horizontal well in K2 c reservoir, was implemented successfully in 2009.