板橋—合水地區(qū)長(zhǎng)6儲(chǔ)層綜合評(píng)價(jià)
[Abstract]:The Banqiao-Heshui area is located in the southwest of the Yishan slope in Ordos Basin. The total area of the study area is about 5700km2. The Yanchang 6 reservoir of the Triassic is the main oil-bearing series in the current oilfield development, and the Chang-6 reservoir in this area has low porosity. The characteristics of low permeability and low oil saturation are typical "three low reservoirs". The sedimentary environment of Chang-6 reservoir in the study area is dominated by deep lake-semi-deep lacustrine facies, which is influenced by the physical provenance of southwest and northeast of the region as a whole. The distribution of sand bodies in Chang-6 reservoir in Banqiao-Heshui area is caused by the difference of influence degree of provenance. In this paper, more than 400 wells in the whole area have been carefully compared and divided through data investigation and previous studies. The sedimentary facies and structure of the study area have been studied by using the experimental data such as core photo, casting slice, scanning electron microscope, particle size analysis and so on. The characteristics of petrology are comprehensively studied. By means of high pressure mercury pressure experiment, constant velocity mercury pressure experiment, oil-water phase permeability experiment and nuclear magnetic resonance experiment, the process of describing the micro-pore structure and seepage mechanism of reservoir from qualitative description to quantitative characterization has been realized. A series of relationships between lithology and physical property, porosity and permeability, physical property and oil-bearing property, physical property and electrical property are established. On this basis, from the reservoir geological characteristics, micro-pore structure characteristics, micro-porous seepage characteristics, local micro-structure, and other aspects of the control factors affecting reservoir physical properties are comprehensively analyzed. The representative physical parameters, micro-pore structure parameters and permeability characteristic parameters are extracted. By using SPSS statistical software, Q-type clustering method is selected to realize the classification and comprehensive evaluation of reservoir types, and the reservoirs are divided into four categories from good to differential. The comprehensive parameter evaluation table of each type of reservoir is set up, and the dominant reservoir distribution area in the study area is screened, which provides a powerful basis for the development, deployment and increase of reservoir production in the next step of oilfield development, deployment and increase of production.
【學(xué)位授予單位】:西北大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:P618.13
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