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Research Of Remaining Gas Distribution In Qiudong Reservoir

Posted on:2014-01-01Degree:MasterType:Thesis
Country:ChinaCandidate:J JiFull Text:PDF
GTID:2250330425482958Subject:Mineralogy, petrology, ore deposits
Abstract/Summary:PDF Full Text Request
Main gas reservoir3in the West Xishanyao group of qiudong reservoir as a monolithic small gas reservoir with low porosity and low permeability, with several sets of air water system, gas bearing intervals span, up to700m. Gas reservoir has developed10years, because of the reservoir interlayer and intrastratal heterogeneity is serious, poor physical property, larger well spacing and pressure drop amplitude, in the well and no well controlled between local regions and sections of some poor and small layer still have more undeveloped reserves and remaining recoverable reserves. Based on the remaining gas research center, comprehensive utilization of geological, logging, production test and dynamic information of production data in the study area, with the aid of mathematical geology statistical method, method of using stochastic modeling is carried out in-depth research of fine reservoir model, using static and dynamic analysis of combining, technical route to study the dynamics of gas reservoir and combining numerical simulation, has conducted the system research to the law of distribution of remaining gas, to guide the work of the late remaining gas potential field.The focus of this paper is to find out the reservoir plane and vertical distribution of remaining gas. Mainly for the following work:1. By the analysis of well logging facies distribution characteristics of sedimentary microfacies, and on the basis of the research on sedimentary microfacies and production characteristics, established the relationship between the two facies. Sedimentary environment (facies) determines the production layer (sand) on the macroscopic scale and microscopic reservoir pore structure and sedimentary environment, different forms of different scale sand body and reservoir characteristics, which leads to the productivity level of different. In the strong hydrodynamic, sand bodies developed area, production capacity is relatively high, conversely, weak capacity.2. Through the variation coefficient, the on rush coefficient, permeability coefficient, stratification and sand density and other parameters on the reservoir heterogeneity is studied. Its influence on the distribution of remaining gas is expounded from two aspects of distribution and the parameters of reservoir sand body.3. Make full use of the logging and fine geologic research results, optimal deterministic modeling method to establish the3D structural mode;establishment of3D reservoir faciesmodel optimized sequential indicator method; optimal sequential Gauss simulation to establish3D attribute model technology. Finally established the static three-dimensional geologicalmodel of Qiudong gas field main gas production West3zone.4.The numerical simulation results show that,the West31layer remaining gasdistribution type is mainly sedimentary microfacies controlling and low pressure;West32layer mainly for development well network without controlling and interlayer heterogeneoustype;West33layer is mainly sedimentary microfacies,development well network withoutcontrolling,layer the heterogeneous type and heterogeneity of type.
Keywords/Search Tags:Qiudong gas field, Sedimentary microfacies, Reservoir heterogeneity, Numerical simulation, Distribution of remaining gas
PDF Full Text Request
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