The Study Of Buried Hill Reservoir Characteristics In West Agure

The study area is located in the mid south of Western Sag of the west slope, from the down steps of west slope to east of Qingshui sag. The western slope of buried hill (Huanxiling Qijia Dujiatai buried hill)report of proven petroleum reserves, mostly concentrated in mid and high area of buried hill,and the blank of reserves for the inner of deep buried hill that has been explored,central South of the Western Sag of aleogene high degree of exploration the Paleogene,favorable targets for the implementation and increase the difficulty of ensuring buried hill,and a relatively low degree of exploration,the favorable exploration area,the layer buried hill in central South of the Western Sag is multiple,including the Archean,Proterozoic and Mesozoic.The reservoir type is diverse,both tectonics formed fault block oil reservoir, and reservoir formed by stratigraphic lithology.The complexity of the buried hill reservoir forming conditions,oil gas water distribution uncertainty,further exploration of oil and gas directly is restricted.This thesis is mainly to carry out structural interpretation, reservoir forming condition analysis,the structural interpretation in comprehensive utilization of seismic, drilling, logging and analytic testing data,analysis the structural interpretation and reservoir characteristics,through the construction of several geological profile throughout the area of the four directions, the establishment of the macro framework of seismic interpretation by logging,calibration and VSP determine the deep Buried hill top,in the inter of well and the lack of well area,the seismic attributes are jointly determined. Through the analysis of tectonic evolution and fault growth index,buried hill formated the prototype of trap in the first third,the main growth period of E2S4, formed in the E2S3.The favorable transformation of trap favorable target areas is affected by early fracture, not by the late fracture.In the analysis of reservoir conditions, the deep fracture, sufficient oil source and the inter layer inside buried hill make it oil accumulation possible inside. Combined with previous understanding of the analysis and research types of metamorphic rocks,to determine that prediction lithologic relative inter layer of buried hill has superiority in hydrocarbon accumulation,fracture is the key of buried hill and insider, through the analysis of the adjacent wells,the crack of the study area is relatively prior, easy to form the fracture type reservoir,the huge thickness of overlying E2S3 and E2S4and shale inside,can be used as the cover layer,at the same time,can be used as the favorable hydrocarbon source rock.Preferred target in the southern of buried hill region,according to the discussion of the previous data of oil supply window,exists for the hydrocarbon rate in the target area,thus forming.According to the area of the reservoir type and location,divided into two reservoir models,is discussed,the favorable target into the possibility of reservoir. At the end of the target area for hydrocarbon detection,analysis the target area of buried hill weathering crust and inside the reservoir has a certain effect.Based on the above studies, summarized characteristics of buried hill reservoir and analysis of the control factors of hydrocarbon accumulation in the research area, type of buried hill oil reservoir,buried hill reservoir model;the implementation of the buried hill structure and fracture distribution,to find out, buried hill lithological composition,distribution and controlling factors of reservoir,to determine the contact between buried hill and the effective hydrocarbon source rock, so as to optimize the favorable target, proposed suggested well location.