白豹－坪庄地区长6油层组沉积相特征

Sedimentary facies characteristics of Chang 6 member in Baibao-Pingzhuang Area

苏 洁 陈恭洋 张路崎 李 会

长江大学油气资源与勘探技术教育部重点实验室，湖北 荆州 434023

MOE Key Laboratory of Oil &Gas Resources and Exploration Technology, Yangtze University, Jingzhou 434023, China

鄂尔多斯盆地上三叠统延长组第6段在白豹－坪庄地区是最重要的勘探目的层之一。通过岩心、测井和地质资料综合分析，认为该区长6油层组砂体发育的是一套三角洲前缘亚相砂体，包括水下分流河道、河道侧翼、河道间和河口砂坝4种微相。进一步编制沉积微相平面图，分析长6油层组各砂体的沉积特征和沉积微相的平面展布规律，证明该区有2个物源，以北东物源为主；且长63层是主力储层，其物性最好。

The sixth member of Yanchang Formation is one of major exploration target zones in Baibao-Pingzhuang Area in Upper Triassic, Ordos Basin. Through the analysis of core, logging and geologic data, the Chang 6 member consists of a set of deltaic front subfacies sandbodies in this area,including the subsea distributary channel,channelfrank,interchanneland channelmouth bar microfacies.Based on the analysis of depositional characteristics of Chang 6 member and depositional microfacies distribution rules in plane, we get the fact
thattherearetwomaterialsources inthisareathrough the drawing ofsedimentary microfacies plane diagram,in which the materialsource ofnortheastdirectionismain.Chang63member isthemain reservoiranditsphysicalproperty isthebest.