石油实验地质
石油實驗地質
석유실험지질
Petroleum Geology and Experiment
2015年
5期
619-626
,共8页
张新顺%王红军%马锋%孙相灿%宋志慧
張新順%王紅軍%馬鋒%孫相燦%宋誌慧
장신순%왕홍군%마봉%손상찬%송지혜
致密油%资源丰度%甜点%递减曲线分析%巴肯组%威利斯顿盆地
緻密油%資源豐度%甜點%遞減麯線分析%巴肯組%威利斯頓盆地
치밀유%자원봉도%첨점%체감곡선분석%파긍조%위리사돈분지
tight oil%resource abundance%sweet spot%decline curve analysis%Bakken Formation%Williston Basin
通过对美国致密油成熟探区,威利斯顿盆地巴肯组致密油详细解剖研究,分析致密油资源富集区与甜点区的分布关系。基于948口钻测井数据,绘制多参数地质平面图,利用成因法、体积法和递减曲线法分别对盆地的致密油资源丰度进行评价,对比不同方法下资源丰度的差异,并结合地质参数平面图分析致密油甜点区的分布特征与规律。研究结果表明:威利斯顿盆地巴肯组优质烃源岩是致密油形成的先决条件;成因法和体积法评价的资源富集区与致密油甜点区分布差异较大,不能直接单独应用于甜点的预测;邻近资源富集区的过渡区,同时具备靠近生烃中心、具有地层超压、较高气油比、有一定构造幅度等多个相对有利的因素,是致密油甜点发育区;在构造上,这些过渡区往往发育在盆地斜坡区或靠近背斜等正向构造的翼部。
通過對美國緻密油成熟探區,威利斯頓盆地巴肯組緻密油詳細解剖研究,分析緻密油資源富集區與甜點區的分佈關繫。基于948口鑽測井數據,繪製多參數地質平麵圖,利用成因法、體積法和遞減麯線法分彆對盆地的緻密油資源豐度進行評價,對比不同方法下資源豐度的差異,併結閤地質參數平麵圖分析緻密油甜點區的分佈特徵與規律。研究結果錶明:威利斯頓盆地巴肯組優質烴源巖是緻密油形成的先決條件;成因法和體積法評價的資源富集區與緻密油甜點區分佈差異較大,不能直接單獨應用于甜點的預測;鄰近資源富集區的過渡區,同時具備靠近生烴中心、具有地層超壓、較高氣油比、有一定構造幅度等多箇相對有利的因素,是緻密油甜點髮育區;在構造上,這些過渡區往往髮育在盆地斜坡區或靠近揹斜等正嚮構造的翼部。
통과대미국치밀유성숙탐구,위리사돈분지파긍조치밀유상세해부연구,분석치밀유자원부집구여첨점구적분포관계。기우948구찬측정수거,회제다삼수지질평면도,이용성인법、체적법화체감곡선법분별대분지적치밀유자원봉도진행평개,대비불동방법하자원봉도적차이,병결합지질삼수평면도분석치밀유첨점구적분포특정여규률。연구결과표명:위리사돈분지파긍조우질경원암시치밀유형성적선결조건;성인법화체적법평개적자원부집구여치밀유첨점구분포차이교대,불능직접단독응용우첨점적예측;린근자원부집구적과도구,동시구비고근생경중심、구유지층초압、교고기유비、유일정구조폭도등다개상대유리적인소,시치밀유첨점발육구;재구조상,저사과도구왕왕발육재분지사파구혹고근배사등정향구조적익부。
Tight oils from the Bakken Formation in the Williston Basin in the USA were studied to find out the relationship between the resource?rich regions and sweet spots for tight oils. Some maps with multiple parameters were drawn based on drilling and logging data from 948 wells. Genetic method, volume method and decline curves were used to evaluate the abundance of tight oils in the study area. The distribution of sweet spots was studied by comparing differences in abundance combined with geological data. The results show that high?quality hydrocarbon source rocks of the Bakken Formation were a prerequisite for the generation of tight oils. The resource?rich regions predicted by the genetic and volume methods clearly varied with the occurrences of tight oils, and could not be used individually in the prediction of sweet spots. The transitional region adjacent to the resource?rich regions had some favorable conditions for tight gas development, such as closeness to the hydrocar?bon generation center, formation overpressure, high gas?oil ratio and tectonic setting. These transitional regions often developed in the slope zone of the basin or on positive structures such as anticlines.