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Reservoir Characterisics of Sandy Conglomerate Body in the 4th Member of Shahejie Formation, Yan 22 Block of Yanjia Area

Author: FanHaiLin
Tutor: YuanJing
School: China University of Petroleum
Course: Geology
Keywords: Glutenite Reservoir Characteristics Shahejie Paleogene Salt 22 Dongying Depression
CLC: P618.13
Type: Master's thesis
Year: 2010
Downloads: 156
Quote: 1
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Abstract


In Dongying Depression the salt home region salt 22 Paleogene the sand four on subsegmental glutenite study, the integrated use of core, log, and analyze test data, its reservoir characteristics. Through detailed observation of the core description of the study area, sand four developmental phase of rock type are summarized in coarse conglomerate, fine conglomerate, pebbly sandstone, sandstone and mudstone five categories. In the the core fine homing premise, based primarily on the response characteristics of the AC and the CNL logging, rock quantitative phase identification standards, by well identification of the sand four on segment rock facies types. The study area, sand four developmental nearshore subaqueous fan facies within the fan subfacies including the side edges of the main channel and channel microfacies in fan subfacies include braided channel channel leading edge and the channel between the micro phase, the outer fan subfacies including deep waterway, the end and the outer fan mud microfacies. Single well sedimentary microfacies detailed divided according to the various types of deposition unmarked. In the study area, deposition of sand four glutenite Division and Sedimentary microfacies distribution characteristics of the study on the basis that the longitudinal study area the sand four on submember sedimentary facies bottom-up was within the fan - in fan - outer fan the positive cycle. The northern provenance glutenite maximum thickness, thinning overall on the south, east, west three directions. Plane, as the water deepened, the lake area to expand, fan body development of reducing the scope of the main channel and braided channel gradually shrinking. Core observation, thin section analysis, property analysis and scanning electron microscope and other technical means, the type of of salt 22 blocks glutenite reservoir diagenesis, diagenetic stage divided and the type of reservoir space. The study area glutenite reservoir as a whole in the period of diagenetic A type of reservoir space mainly secondary porosity and pore - cracks in composite systems. That study reservoir properties mainly in porosity and permeability - ultra-low permeability, low permeability and low porosity and low permeability, vertical on the development of secondary porosity with. Pore ??structure divided according to the characteristics of the reservoir pore structure parameters and mercury intrusion curve - in the hole in the thin throat, into three categories - small hole thin throat and holes fine throat. Sandy conglomerate reservoir properties in the study area is mainly controlled by sedimentation, diagenesis and reservoir pore structure characteristics. The results show that, in the acid dissolution, developed in the middle fan braided channel microfacies with - holes in thin throat pore structure and physical properties of grain-supported conglomerate. Comprehensive analysis of the relationship of the the reservoir \A comprehensive evaluation of the study area, the reservoir sand four glutenite divided into three categories: reservoir porosity and low permeability reservoir, Class I, II class of low permeability reservoirs and Class III low permeability - ultra-low permeability reservoirs, reservoir performance and oily descending order. Favorable reservoir development in 3-5 small layer of sand group II.

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