Hydrocarbon accumulation dynamics study of Boxing area of Dongying depression

doi:10.3969/j.issn.1673-9787.2011.05.009

Abstract：Based on the theory and method of dynamic system of pool forming and the element of petroleum system, such as source rock, reservoir and cap etc, this paper gives a comprehensive research and analysis on the study of fluid conducting system, tectonic stress field and formation pressure of Boxing area of Dongying Depression. The research study shows that there are two abnormal pressure centers which are the Boxing subsag area and Chunhua uplift. The main stratum where the abnormal pressure develop is the third and forth strata of Shahejie Formation and the distribution is controlled by the mudstone, the action of hydrocarbon generating, sandstone conducting system and faults factor. The fluid conducting system of Boxing area, which consist of sand strata, unconformity surface and faults, develop very well and control the oil migration and accumulate. The Gaoqing fault, Shicun fault and Boxing fault dominate the vertical migration of oil, and sand conducing system master the horizontal migration of oil. In the meanwhile, the unconformity surface are the important migration channels in partial areas. The study area divide into three petroleum dynamic system in vertical direction, namely self - sourced ＆ closed, other - sourced ＆ semi - closed and other - sourced ＆ closed types, according to formation pressure, source rock and closure characteristics.