定边五星庄油区延9、延10油层组地质特征研究

Study on Geological Characteristics of Yan9 and Yan10 Formations of Wuxingzhuang Oil Block in Dingbian

通过研究分析各种钻井取芯资料,确定了定边油田五星庄区延9延10油藏构造类型、砂体展布及沉积相类型,认为延9油层组为三角洲平原沉积,主要发育河漫沼泽、分流河道和水下分流河道3种微相类型,属构造油气藏;认为延10油层组为河流相沉积,主要发育主河道、支流河道和河漫滩3种微相类型,为岩性-构造油气藏。在此基础上进行了有利区的预测,为老油田的扩边勘探提供了有力的依据。

Through the research of various drilling and core data, construction type, sand body distribution and sedimentary facies of Yan9 and Yan10 reservoirs of Dingbian oilfield Wuxingzhuang region were identified. It＇s pointed out that Yan9 oil-bearing formation is delta plain subfacies, it mainly developed 3 kinds of microfacies types of distributary channel, underwater distributary channel and floodplain marsh, it belongs to structural hydrocarbon reservoir; Yan10 reservoir group of river facies mainly developed the main river, a tributary of the river channel and floodplain, and it belongs to lithologic structural oil and gas reservoir. Based on this, the forecast of the favorable region was provided, which could provide a powerful basis for the expansion and exploration of the old oil field.