吐哈盆地台北凹陷低含油饱和度油藏勘探实践及启示  

EXPLORATION APPLICATION AND PERFORMANCE OF LOW OIL SATURATION RESERVOIRS IN TAIBEI SAG OF TUHA BASIN

作　　者：康积伦 靳继坤 蒲振山 余晓华 KANG Jilun;JIN Jikun;PU Zhenshan(Research Institute of Exploration and Development,Tuha Oilfield Company,PetroChina,Hami 839009,Xinjiang)

机构地区：[1]中国石油吐哈油田分公司勘探开发研究院

出　　处：《新疆石油天然气》2019年第2期1-5,I0001,共6页Xinjiang Oil & Gas

基　　金：国家科技重大专项(2017ZX05001003-007)

摘　　要：吐哈盆地台北凹陷发育多个大的复式油气聚集带,油气藏类型丰富。近年来,在油田成熟主力层系扩边扩块的同时,综合运用钻井、地震和测试化验等资料,地质、工程一体化研究,在主力油层以下发现了红台、鄯善西山窑组等两个5000万吨级储量规模的低含油饱和度油藏。低含油饱和度油藏具有储层低孔特低渗、含油饱和度低、常规试油试采油气产量低且油水同出或不出液等特点。综合研究表明,台北凹陷低含油饱和度油藏成因机制受油源条件、储层低孔特低渗、油气调整、构造幅度低等影响,近油源、储层“甜点”、古构造背景、保存条件好等是低含油饱和度油藏规模富集的主要原因。水平井钻探与体积压裂储层工艺改造是低含油饱和度油藏有效动用的工程配套技术。地质、地球物理及工程技术等相结合,形成了一套有效的低含油饱和度油藏勘探技术。There are many large multiple oil and gas accumulation belts in Taibei sag of Tuba basin, which are rich in oil and gas reservoirs. In recent years, two low oil saturation reservoirs with 50 million tons of reserves,Hongtai and Shanshan Xishanyao formations, have been discovered under the main reservoirs by using drilling,seismic and testing data and integrated geological and engineering research. Low oil saturation reservoirs have the characteristics of low porosity, ultra-low permeability, low oil saturation,low oil and gas production by conventional oil testing and production test, and oil and water co-production or non-liquid production. Comprehensive study shows that the genetic mechanism of low oil saturation reservoirs in Taibei sag is affected by oil source conditions, low porosity and permeability, oil and gas adjustment and low structural amplitude. Near oil source,reservoir "dessert", paleotectonic background and good preservation conditions are the main reasons for largescale enrichment of low oil saturation reservoirs. Horizontal well drilling and volume fracturing reservoir technology transformation are engineering supporting technologies for effective production of low oil saturation reservoirs.Combining geology,geophysics and engineering technology, a set of effective low oil saturation reservoir exploration technology has been formed.

关 键 词：吐哈盆地 台北凹陷 复式油气聚集带 低含油饱和度油藏 成因机制 勘探技术 

分 类 号：TE122.3[石油与天然气工程—油气勘探]