Optimization Of Prospecting Area And Exploration Deploy In SHIJIAPAN Area Of ZIBEI Oilfield

In this thesis, on the basis of previous research, Petroleum Geology, lithofacies and paleogeography, and reservoir geology, and other methods to study SHIJIAPAN exploration area. To basic data analysis, stratigraphic correlation, to carry out the extension of Chang4+5and Chang6reservoir rock, reservoir diagenesis, and sedimentary facies analysis, and prediction of favorable zone, and provide the basis for the exploration of deployment.SHIJIAPAN exploration area deposition analysis showed that the main development of the delta, lacustrine depositional system, and the division of the sub-phase and phase. Paleogeographic evolution of Chang64Chang63Chang62Chang61Chang4+52, development of a Chang4+51delta plain. Reservoir during diagenesis has experienced varying degrees of compaction, cementation, metasomatism and dissolution, compaction and cementation is not conducive to the preservation of porosity, and accountable to, and the dissolution improved the reservoir to a certain extent. Based on the composition of clay minerals, quartz overgrowth, pore types and parameters analysis, reservoir into the A subunit of the late diagenesis and long may enter the late diagenesis A-B of6.In the Area Chang4+5and Chang6sandstone reservoir, gray, light gray-green feldspar sandstone, part of the lithic arkose, granularity to fine sand, followed by silt and sand. Miscellaneous base of mica and clay-based cements are mainly quartz, feldspar, calcite, and small amounts of dolomite and pyrite. Sorting, roundness seq angular-sub-round-based, showed a grain-supported line of contact between the particles, cement types of pore type and increase-pore type.Exploration properties in the region analysis of data banks of the historian statistics show that the the Yanchang porosity and permeability values changes, strong heterogeneity, the whole hole, low permeability reservoirs. High porosity, permeability, and distributary channel (underwater distributary channel) region has a good correlation in the plane. The physical properties and heterogeneity of the reservoir by the deposition and diagenesis. Favorable facies to distributary channels and underwater distributary channel. According to Zhao JZ division method in reservoirs of the Ordos Basin, that historians River exploration area mainly developed in the reservoir of the three categories, Class Ⅱ, Class Ⅲ and Ⅳ classes, which class Ⅲ (can be divided into Ⅲ a, Ⅲ b) is the main reservoir of the study area layer.Analysis of reservoir control the enrichment factors and oil and gas law that the conditions to extend the group of historians River exploration area has a more favorable combination of reservoir and oil and gas traps, lithologic and structural-lithologic reservoirs. Favorable reservoir development, combined with productivity features, favorable block prediction to extend the group in different layers in the study area, and direction to the next step in the exploration and development.