Diagenetic Facies And Diagenetic Dynamic Analysis Of Es3in Qikou Sag

China’s onshore oil and gas exploration into structural reservoirs and lithologic-stratigraphic reservoirs and try a new stage, part of the basin has entered the lithology-stratigraphic reservoir exploration of a new era. Exploration depth of the Chinese andshallow to deep and ultra-deep reservoir expansion, low porosity and permeability ofsandstone, carbonate rocks and volcanic rocks from the conventional clasticexploration and research from the deposition of opposite diagenetic extension.Diagenetic facies is the physical manifestation of the effects of diagenesis of thereservoir performance of a variety of factors. In this paper, the division of diageneticphases Sag reservoir sedimentary characteristics of the clear Qikou pore to poredevelopment in the three main diagenesis: compaction, cementation and dissolution asa reference point to establish the pore-the quantitative relationship between eachdiagenesis, reaching the reservoir quantitative prediction and evaluation. Work areathe target layers and development of the following seven kinds of diagenesis:dissolution facies and compaction-dissolution, cementation-dissolution,compaction phase, cementation-compaction, compaction-cementation, cementationand crack phase. Compaction-the cementation, cementation-compaction phase iswell developed. Cementation is the work area the main controlling factors of thephysical properties of and cementation and compaction of the destruction of physicalproperty ratio is4.7:1.3.The study of the mechanism of diagenesis and reservoir development, law,fluid-based lines, segments stratigraphic units, and take full account of the differenceof deposition settlement, under high temperature and high pressure systems and lowporosity and low permeability background, the modern reservoir rockphysicalchemical characteristics to determine the different fluids of the nature andsource, which of dissolution and cementation generations, and distribution law to carry out in-depth and meticulous research. Sand three sections of diagenetic fluid canbe divided into four, which the deep development of secondary porosity with a planardistribution of the development of the third phase of mature hydrocarbon fluids.The Qikou Shahejie three sections of high-quality reservoir located on the northslope of Qibei and six rooms off the nose, Nandagang buried hill belt and otherregions, generally formed in the braided river delta and nearshore subaqueous fanand other waterways.mouth bar sand body, today the dissolution phase, compaction-dissolution phase, cementation-dissolution relative to the main. The diageneticcoefficient greater than0.01, the comprehensive evaluation index greater than0.2.