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通过对七个泉地区地质录井和测井曲线资料分析,在下干柴沟组下段识别出2个沉积体系域。体系域主要为湖侵体系域和湖退体系域,其中储集体类型较为丰富,主要为扇三角洲砂体和深湖-半深湖浊积砂体。将测井层序分析结果和地震储集层预测技术相结合,以体系域进行地震属性分析和沉积相编图,预测在七个泉地区东南部的三角洲前缘和北部的湖底扇砂体能够形成岩性油气藏。
By analyzing the data of geological logging and well logging in Qigequan area, two sedimentary system domains are identified in the lower section of Qianchaigou Formation. The main system tract is the lacustrine system tract and the lake retreat system tract, in which the types of reservoirs are relatively abundant, mainly composed of fan deltaic sand body and deep lake-semi-deep lake turbidite sand body. Combining the logging sequence analysis results with the seismic reservoir prediction techniques, the seismic attribute analysis and sedimentary facies map of the system tract are used to predict the presence of the sublacustrine fan sector in the delta front and north of the southeastern part of the Qigequan area Formation of lithologic reservoirs.