Sedimentary facies analyses based on well drilling and logging data from Devonian Kerziertag Formation in Bashitop area of Tarim Basin
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摘要: 利用钻测井沉积相分析手段对塔里木盆地巴什托地区泥盆系克孜尔塔格组沉积相进行了研究.结果表明,该区克孜尔塔格组主要形成于浪控无障壁碎屑滨岸沉积环境,前滨亚相包括砂滩、沟槽和砂坝3种微相.单井实钻油气显示:砂滩微相含油气性最好,其次为靠近砂滩的沿岸砂坝,处于上临滨的沿岸砂坝尽管物性较差,但由于与下临滨构成频繁的互层,非常有利于油气的保存,因此也具有较好的油气显示.Abstract: Sedimentary facies of the Devonian Kerziertag Formation in Bashitop area of the Tarim Basin have been studied with drilling and logging sedimentary facies analysis method.The Kerziertag Formation in the study area was formed in wave-dominated barrier-free clastic littoral depositional environment.The foreshore subfacies include 3 microfacies such as beach,groove and sand dam.The petroleum shows of actual drilling in single well have indicated that the beach microfacies are the most abundant in petroleum,and the coastal sand dam near to beach takes the second place.As to the coastal sand dam in the upper near shore,it interbeds with the lower near shore and is also favorable for petroleum preservation even though its physical property is poor.
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Key words:
- sedimentary facies /
- Kerziertag Formation /
- Devonian /
- Bashitop area /
- Tarim Basin
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