Evaluation Of Oil And Gas And The Oil And Gas Evaluation Of The Sinian Light Shall In

Sichuan deep marine carbonate oil and gas exploration has made a major breakthrough, Sichuan Gao shi ti-Moxi area Sinian basic petroleum geological exploration showed better conditions, abundant oil and gas resources, good exploration potential. However, given Sinian intervals deeply buried diagenesis complexity, lack of accumulation analysis and exploration factor and low level of high-Aikawa mill east-Guang’an Dengying basic reservoir characteristics, main factors, recognizing development Law and hydrocarbon accumulation and other issues is not yet clear. Therefore, deepen Aikawa-Guang’an Dengying reservoir characteristics research, implementation of its hydrocarbon potential, significant expansion of exploration scene.He’chuan-Guang’an Sinian Carbonate Dengying algae gray dolomite, dolomite grain based, time for psammitic dolomite, dissolved collapse breccia. Sedimentary facies carbonate rocks dominated tidal flat, concrete can be divided into shallow water table Ping Ping and semi-deep water table and high-energy beach two phases, higher energy mound, algal mounds, low-energy cloud flat, mud flat and other low-energy cloud Asia/microfacies. Reservoir space types are intergranular dissolved pore, intergranular dissolved pores and cracks in the main, the general case of fracture-cavity reservoir. Study Area and its adjacent area lights Sec porosity of2%to3.5%and permeability of0.01～0.1mD; lamp Sec porosity ranged from4.0%to9.0%, from2.5times to3.0%, penetration rate of0.1～10mD, overall is a low porosity and low permeability reservoirs. The reservoir is mainly distributed in the top of lamp two and lamp four, the upper reservoir of lamp two is larger thickness, horizontal distribution relatively serials, light the upper four relatively continuous lateral reservoir distribution, thickness gradually thinned from west to east.The main source rocks in the study area over the dark shale overlying Qiongzhusi group based, time for lights set of lights three segments and Doushantuo. Among them, Qiongzhusi source rock thickness of about90m, Ro greater than2%organic carbon abundance average of1.48%, angry strength of about20×108m3/km2. Therefore, Qiongzhusi group should be quality and effective shale source rocks.He’chuan-Guang’an lights Formation by Leshan-Longnusi palaeohigh obvious evolution, migration and accumulation of oil and gas accumulation characteristics multiple stages. Overall, the study area is located in a relatively favorable Dengying sedimentary environment, tectonic evolution in favor of a reservoir, the reservoir-cover with better favorable for hydrocarbon accumulation, mainly in the gas reservoir trap type structure-lithology traps mainly for relatively favorable exploration zones.