四川盆地中部地区侏罗系致密油研究新进展  

New research progress of Jurassic tight oil in central Sichuan Basin

作　　者：杨跃明[1] 杨家静[1] 杨光[1] 陶士振[2] 倪超 张斌[2] 何晓东[1] 林建平[4] 黄东[1] 刘敏[1] 邹娟[1] 

机构地区：[1]中国石油西南油气田公司勘探开发研究院 [2]中国石油勘探开发研究院 [3]中国石油杭州地质研究院 [4]中国石油西南油气田川中油气矿

出　　处：《石油勘探与开发》2016年第6期873-882,共10页Petroleum Exploration and Development

基　　金：中国石油天然气集团公司重大专项"四川盆地侏罗系石油勘探开发关键技术研究(2012E-2601)"

摘　　要：针对四川盆地中部地区侏罗系致密油资源潜力、储集层类型、油藏类型以及增产改造工艺技术开展攻关研究。通过致密油资源评价方法估算侏罗系5套油层石油资源量达16′108 t,表明侏罗系石油资源潜力大。通过岩心描述、薄片观察、试井、试采等静态、动态资料综合分析认为,侏罗系主要为特低孔、特低渗的裂缝-孔隙型储集层,而不是传统认为的单一裂缝型储集层;油藏类型主要为近源充注、连续型分布的致密油;优质烃源岩、物性较好的储集层和裂缝是致密油富集的主控因素。沙一段砂岩、大安寨段介壳灰岩储集层现场试验表明,水平井体积压裂和水平井压裂酸化具有较好的增产改造效果。The resource potential, ＂fractured＂ reservoir, reservoir type and stimulation technology of Jurassic tight oil in central Sichuan basin were investigated. Based on the evaluation method of tight oil resource, the amount of oil resources of the five Jurassic layers were estimated at 1.6 billion tons, showing that the Jurassic oil resource potential in central Sichuan Basin is huge. Integrated analysis of static and dynamic data including core-description, thin section examination, well test and exploration show Jurassic reservoirs are fracture-pore reservoir with ultra-low porosity, super-low permeability, rather than single ＂fractured＂ reservoir believed before. Jurassic reservoirs are tight oil reservoir with the characteristics of near source charge and continuous distribution. The high-quality hydrocarbon source, reservoir with better physical properties and fracture are the main factors controlling tight oil enrichment. ＂Horizontal well ＋ volume fracturing＂ of Shayi Member tight sandstone reservoir and the ＂horizontal well ＋ fracture acidizing＂ for the Da＇anzhai Member shell limestone reservoir have achieved good stimulation effect.

关 键 词：四川盆地中部 侏罗系 致密油 资源潜力 致密储集层 富集规律 增产改造 

分 类 号：TE122.2[石油与天然气工程—油气勘探]