断陷湖盆斜坡区油气富集理论与勘探实践——以黄骅坳陷古近系为例

发布时间：2018-11-08 14:18

【摘要】：斜坡区是中国东部断陷湖盆的主要构造单元,是渤海湾盆地重要的油气规模增储区带。在斜坡区多年综合研究和勘探实践的基础上,提出了斜坡区(大型缓坡带)具有高、中、低分异性的新认识,即高、中、低斜坡在沉降速率、沉积相序、储层物性、生烃演化、地层压力、流体性质、油气藏类型等七方面的地质差异性,形成了断陷湖盆斜坡区优势相油气富集理论,其理论内涵为:高斜坡沟槽控砂,优势运移汇聚相富集;中斜坡坡折控砂,优势构造岩性相富集;低斜坡远扇控砂,优势源储耦合相富集。以此理论为指导,开展斜坡区精细勘探与钻探部署,斜坡区地层岩性油气藏勘探取得重要勘探成果,近5年来新增三级石油地质储量超过3×10~8t,发现了4个千万吨级效益建产区块和3个亿吨级规模增储区,证实了斜坡区优势相油气富集理论在规模效益增储及高效建产区块中的重要指导意义。
[Abstract]:The slope area is the main tectonic unit of the faulted lake basin in eastern China, and it is an important oil and gas accumulation zone in the Bohai Bay basin. On the basis of the comprehensive research and exploration practice in the slope area for many years, it is proposed that the slope area (large gentle slope zone) has a new understanding of high, middle and low heterogeneity, that is, high, middle and low slopes are characterized by sedimentation rate, sedimentary facies sequence, reservoir physical properties and hydrocarbon generation evolution. The geological differences in seven aspects, such as formation pressure, fluid property, oil and gas reservoir type, have formed the theory of hydrocarbon enrichment of dominant facies in the slope area of faulted lacustrine basin. The theoretical connotation of the theory is as follows: high slope trenches control sand, predominance migration and accumulation phase enrichment; The slope of middle slope is controlled by sand, the dominant tectonic lithology is enriched, the low slope is controlled by far fan, and the coupling facies of dominant source and reservoir is enriched. Guided by this theory, fine exploration and drilling arrangements are carried out in the slope area. Important exploration results have been achieved in the exploration of stratigraphic lithologic reservoirs in the slope area. In the last five years, the new third-grade petroleum geological reserves have exceeded 3 脳 10 ~ (8) t. In this paper, four benefit production areas of 10 million tons and three hundred million tons of increasing reservoirs are found, which confirms the important guiding significance of the theory of oil and gas enrichment of dominant phase in slope areas in increasing reservoir size and building blocks of high efficiency production areas.
【作者单位】：中国石油大港油田公司;中国石油大学(华东);
【基金】：国家科技重大专项“大型油气田及煤层气开发”(2016ZX05006) 中国石油天然气股份有限公司重大科技专项“大港油区大油气田勘探开发关键技术研究”(2014E-06-01)
【分类号】：P618.13

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