塔东隆起带震旦系古油藏的发现及勘探意义  

Discovery of Sinian paleo-oil pool in east Tarim uplift zone and its exploration significance

作　　者：田小彬[1] 李强[1] 王年梅[1] 马新海[1] 杨子成[1] Tian Xiaobin;Li Qiang;Wang Nianmei;Ma Xinhai;Yang Zicheng(PetroChina Daqing Oilfield Limited Company,Daqing,Heilongjiang 163712,China)

机构地区：[1]中国石油大庆油田有限责任公司

出　　处：《特种油气藏》2019年第4期64-69,共6页Special Oil & Gas Reservoirs

基　　金：中国石油重大科技专项“塔东天然气成藏理论及勘探配套技术研究”(2016E-0204)

摘　　要：针对塔东隆起带震旦系油气成藏认识不清的问题,利用近年来新采集的二维地震、钻井等资料,对塔东隆起带震旦系油气成藏进行研究。结果表明:塔东隆起带震旦系水泉组发育碳酸盐岩台地—缓坡相沉积,早期台地相沉积环境更有利于储层发育;在东探1井震旦系水泉组下部台地相白云岩地层中发现了60 m连续分布的储层沥青,表明震旦系发育有古油藏。东探1井震旦系古油藏是塔里木盆地首次在震旦系发现古油藏,该发现说明震旦系经历了油气成藏过程,沥青分布特征表明沉积相带与岩溶作用对古油藏具有一定的控制作用。该研究开拓了塔里木盆地新的勘探层系,可为塔里木盆地震旦系油气勘探提供部署依据。Aiming at the problem of Sinian hydrocarbon accumulation in east Tarim uplift zone,the Sinian system in this zone was studied by using the newly acquired 2D seismic and drilling data in recent years.The results show that:(1)carbonate platform-gentle slope facies deposits are developed in the Sinian Shuiquan Formation in the east Tarim uplift zone,and the early platform depositional environment is more favorable for reservoir development;(2)a 60 m continuous reservoir bitumen has been found in the platform dolomite strata in the lower part of the Sinian Shuiquan Formation in Well Dongtan 1,indicating that there is a paleo-oil pool in the Sinian System.The Sinian paleo-oil pool in Well Dongtan 1 is the first discovery of Sinian paleo-oil pool in the Tarim Basin,which indicates that the Sinian System experienced the process of hydrocarbon accumulation.The distribution characteristics of bitumen indicate that sedimentary facies zone and karstification have certain control effect on the paleo-oil pool.This study opens up a new exploration layer in the Tarim Basin and provides a basis for deployment of Sinian oil and gas exploration in the Tarim Basin.

关 键 词：塔东隆起带 震旦系 沥青 碳同位素 古油藏 

分 类 号：TE123[石油与天然气工程—油气勘探]