Long Ping Generation Region 8 ₁ D Seismic Reservoir Prediction

Yanchang formation of Chang81reservoirs is the major oil-produce layer in Dai Jiaping erea. Combined with3-d seismic data、drilling data、mud logging data and analyzing a great quantity of laboratory data, researched sedimentary facies features、reservoir characteristics、Oil control factor, and favorable zones of Chang81reservoirs, Provide a basis for development of the reservoir and Horizontal well deployment of Chang81reservoirs.Chang81reservoirs mainly for middle-fine sandstone, is low porosity, low permeability reservoir. The pore spaces are completely dominated intergranular pore, dissolved pore, under the scanning electron microscopy we can see Intergranular pore is filled with kaolinite Chlorite and other clay minerals and authigenic quartz, feldspar particles by dissolution metasomatism. thickness for5～15m Zhang Jiatan shales is not only the source rocks,but also the regional strata in the area of Chang7reservoirs. At the top of the Chang8reservoirs there is5～20m thickness Mudstone interlayer, which preventing the oil and gas migration from the bottom to Chang7reservoirs to Chang8reservoirs.prediction the sandstone reservoir mainly adopts seismic attribute prediction, Lens method and Multi-parameter logging constrained inversion method.Predicted results show that in Chang812reservoirs the Sand body is developing,but Chang813reservoirs Sand body is not developing.the main direction of the river channel is North east, local river have north-south and east-west Branch.Predicting fracture cracks is given priority to with three generations of coherence, fracture is mainly of northeast in the area, the northwest to the fracture zone is an extension of the fault zone in the Honghe73to74wellblock jade of work area in the southwest.Based on fault broken strata thickness fault can be divided into three categories In profile:I fault is extend the formation of the cretaceous strata; Ⅱ fault is from formation to the bottom of the Jurassic Zhiluo formation; III fault just break in yanan formation.Because of the existence of mudstone interlayer in Chang811reservoirs, fault which as the channel for oil and gas migration is particularly important, Cracks can be used as oil and gas migration channel, also can be used as a reservoir of oil and gas space.the area is a low porosity, low permeability abnormal reservoir, anticline structure for oil and gas control effect is not obvious.As the Thickness of hydrocarbon source rocks、Communicate the growing degree of the fracture cracks of Chang7reservoirs and Chang8reservoirs、Chang811thickness of mudstone interlayer and Chang812、Chang813sandstone thickness this four factors, we divide the favorable zones for Ⅰ,Ⅱ、Ⅲ:I favorable area, hydrocarbon source rocks is thickness、sand body and fracture cracks are developed in Chang8reservoirs; Ⅱ favorable area, Hydrocarbon source rocks is thicker、sand body is developed、Chang811thickness of mudstone interlayer is thinner、fracture cracks is undeveloped;Ⅲ favorable area, Hydrocarbon source rocks is thicker、 Chang811thickness of mudstone interlayer is thicker, sand body and fracture cracks are undeveloped.