东濮凹陷胡庆油田烃源岩地球化学特征分析

The Geochemistry Character of Hydrocarbon Source Rocks of Huqing Oil Field in Dongpu Sag

吴小红 吕新华

WU Xiao-hong LU Xin-hua

中国地质大学 石油系, 湖北 武汉 430074; 中国石化 中原油田分公司 采油五厂, 河南 濮阳 457001

Petroleum Department, China University of Geosciences, Wuhan 430074, China; Zhongyuan Oil Field Company, SINOPEC, Puyang 457001, China

胡庆油田烃源岩主要分布于斜坡带的沙三段和柳屯-海通集洼陷的沙一段、沙三段。通过对有机物类型和丰度、生物标志化合物及热演化与成熟度的研究表明, 烃源岩具有低Pr/Ph值(<1)、较高(-蜡烷含量、高甾烷C27/(C28+C29)比值、水生浮游动植物生源发育等特点, 表明形成于咸化、还原性强的沉积环境, 烃源岩可分为低成熟-未成熟、过成熟、过成熟-成熟三种类型。

Hy drocarbon resource rocks of Huqing oil field mainly exist in the member of Es3 in the slope and of Es1 and Es3 in Liutun-Haitongji subsag.According to the study of types and abundance of organic, biomarkers and thermal evolution, the character are:low data of Pr/Ph (<1), relative great content of γ-gamma cerane, upper ratio of C27/(C28+C29) and growth of aquicolous pelagic animals and plants.These show that hydrocarbon resource rocks come into being in salt and reductive environment. Hydrocarbon resource rocks can be divided into three types:low mature-immature, over mature and over mature-mature.