The Research Of Hydrocarbon Accumulation Model Of Shahejie Formation In Lixian Slope Of Hebei Depression

Have this paper at lixian county after slope tectonic style is relatively single,but various types of sedimentary and phase change a lot of different types of traps and the accumulation configuration complex relations and so on,the main oil and gas formation sedimentary facies sedimentary microfacies are studied,hope to have in hebei central depression at lixian county after slope oil-rich trap phased factors of rich oil reservoir comprehensive evaluation standard is established.Have to find out at lixian county after slope oil-rich trap phased influence factors,this article have reclassify the at lixian county after 2 of slope sand,the sand three sections of the sequence stratigraphy of the scheme,the thought of a tail sand sandstone as second period of high water level of the system domain,at the same time should be at the bottom of the lowstand system tract development,should be a set of sandstone;And three sections of the upper normal as highstand system tract,should be characterized by a set of prograde sand body.And clearly the sedimentary relative to the control action of sand body,and a reasonable explanation for oil and gas water relations.Research suggests that shallow water delta front sand body quality of oil and gas enrichment.Frontal facies sand body development,obvious wave transformation,the reservoir quality is superior,and close to the oil source,easy accumulation of proximal reservoir conditions.Delta front distributary channel and mouth bar often can stack shall,to form larger high quality reservoir sand body,form a continuous accumulation of scale.Through the research found that edge microfacies is the cause of physical lithology enclosed.All kinds of genetic sand body edge is often a sand body thickness thinning,argillaceous increase,reservoir physical property variation,which on the one hand,restricted the oil and gas filling efficiency,on the one hand,forming the sealing conditions.Particularly affected by structural updip direction change microfacies or to thin sand body,property close as possible,it is wide shelving fathered ChuCheng hidden in the oil source of unique types of patterns,is a kind of important form of slope with lithologic reservoir type.Based on the above research,have summarized at lixian county after the patterns inclined four zones:(1)the Chinese and foreign with mouth-yanling multi-source oil region tectonic lithologic composite model;(2)gao Yang-nishiyanagi region consequent fault lithology joint accumulation mode;(3)yanling-President of west subsags buried hill transition zone compound hydrocarbon accumulation mode;(4)in the central and southern slope,to go low abundance multilayer superposition of continuous accumulation model.