德惠断陷深层烃源岩分类评价及成藏关系研究  

Study on classification and evaluation of deep source rocks and their accumulation relations in Dehui Fault Depression

作　　者：卢克宁 LU Kening(Exploration and Development Research Institute,PetroChina Jilin Oilfield Company,Jilin Songyuan 138000,China)

机构地区：[1]中国石油吉林油田分公司勘探开发研究院,吉林松原138000

出　　处：《非常规油气》2021年第6期14-23,共10页Unconventional Oil & Gas

基　　金：国家科技重大专项“松辽盆地南部岩性油气藏区带评价与目标优选”(2017ZX05001-002-007)。

摘　　要：为了搞清德惠断陷深层烃源岩品质情况,针对平面及纵向存在的烃源岩岩性、成熟度等差异大的问题,应用最新的分岩性、分成熟度的评价标准,根据不同的地层对每个洼槽进行精细分类评价,明确重点洼槽烃源岩品质特征,落实优质烃源岩分布情况。研究结果表明:有机质成熟度方面,德惠断陷R;为0.7%~2.0%,其中郭家、鲍家洼槽以高熟阶段为主,其他洼槽以成熟阶段为主;有机质丰度方面,泥岩在成熟区的农安南洼槽火石岭组、兰家洼槽营城组及沙河子组以及高熟区的鲍家洼槽营城组烃源岩品质好,碳质泥岩在高熟区的鲍家洼槽营城组品质好;有机质类型方面,德惠断陷深层烃源岩类型主要以Ⅲ;型为主,其中农安南类型最好,以Ⅲ;型为主,部分Ⅱ型;优质源岩发育及与成藏关系方面,优质源岩在火石岭组发育范围大且连片,沙河子组分布范围小,营城组发育不连片,但局部厚度大。优质烃源岩的发育对成藏作用明显,可有效指导下步勘探部署。In order to find out the quality of deep source rocks in Dehui Fault Depression, and analyze the horizontal and vertical differences in lithology and maturation of source rocks, the latest evaluation criteria of lithology and maturity are applied to classify and evaluate each depression according to different strata, to clarify the quality characteristics of hydrocarbon source rocks in key depressions, to implement the distribution of high-quality hydrocarbon source rocks. The results show that: In terms of maturity of organic matter, the R;of Dehui Fault Depression is 0.7% to 2.0%,in which Guojia and Baojia depressions are mainly in high mature stage, and other depressions are mainly in mature stage.In terms of abundance of organic matter, mudstone is in source rock quality of Huoshiling formation of South Nongan, Yingcheng and Shahezi formations of Lanjia depression in mature area, and Yingcheng formation of Baojia depression in high mature area.In terms of organic matter types, the deep source rocks in Dehui Fault Depression are mainly of type Ⅲ;kerogen, among which type is the best in South Nongan, with type Ⅲ;kerogen as the main type and some of type Ⅱ kerogen.In terms of the development of high-quality source rocks and their relationship with hydrocarbon accumulation, all kinds of lithologic mudstones have developed high-quality source rocks, among which pure mudstones in Sourth Nongan have the best quality. The development of high-quality source rocks plays an important role in hydrocarbon accumulation, it can effectively guide the next exploration deployment.

关 键 词：烃源岩 优质 精细评价 成藏 

分 类 号：TE122[石油与天然气工程—油气勘探]