渤海海域A油田物源体系新认识

New understanding of source system of A oilfield in Bohai Sea area

应用重矿物特征、古地貌分析及均方根属性的静态分析法,结合地层水化学特征动态分析法,对渤海A油田东营组物源体系进行研究。结果表明,渤海A油田存在西北、西部2个方向的物源,其北区主要受燕山古隆起控制,南区主要受古长滩河控制。A油田发育2个辫状河三角洲沉积朵叶体,在不同沉积期,朵叶体之间存在不交会、弱交会、叠置3种接触方式。创新性地运用地层水化学特征分析"双物源"模式,动静结合,解决了油田开发生产中为断加剧的矛盾问题,为油田中后期开发提供有效的指导和借鉴。

Based on the characteristics of heavy mineral, the analysis of palaeo-geomorphology, and the static analysis of the root mean square, this paper discusses the source system of Dongying Group in the Bohai A oilfield by combining the dynamic analysis of the characteristics of formation water chemistry. The results show that there are two sources in the northwest and southwest of Bohai A oilfield, the northern part of the oil field is mainly controlled by the Yanshanian ancient uplift, and the southern area is mainly controlled by the ancient Long Beach. Two braided river delta deposits developed in the A oilfield. In different sedimentary periods,there are three kinds of contact modes that do not mix, weakly meet and overlap. Innovative use of formation water chemistry characteristics to analyze the ＂dual sources＂ model by dynamic and static combination solves the growing contradictions of the development of oil field, which provides an effective guidance and reference for the future development.