本文選題：鄂爾多斯盆地 + 蘇里格氣田��； 參考：《西北大學(xué)》2017年碩士論文

【摘要】：蘇里格氣田桃2區(qū)塊奧陶系馬家溝組第五段儲層主要為碳酸鹽巖儲層,具有孔隙度低、滲透率低的特點,儲層非均質(zhì)性極強(qiáng),氣藏連片性差,氣、水分布規(guī)律復(fù)雜,生產(chǎn)過程中地層出水嚴(yán)重,氣、水分布規(guī)律有待進(jìn)一步研究。研究本區(qū)碳酸鹽巖儲層特征,結(jié)合天然氣、地層水地化特征和分布特征,分析氣、水分布規(guī)律及控制因素,對本區(qū)下古生界奧陶系儲層進(jìn)一步勘探開發(fā)具有重要意義。利用巖心觀察、鑄體薄片、掃描電鏡、氣、水相滲等資料,研究了桃2區(qū)塊儲層特征;根據(jù)天然氣組分、地層水測試數(shù)據(jù)分析天然氣和地層水的地化特征;利用試氣和測井資料等,根據(jù)建立的氣、水層綜合識別方法判斷儲層含氣性,研究氣、水層的分布特征,探討氣、水層分布的控制因素。研究認(rèn)為,儲層的主要儲集空間為各類溶蝕孔縫,各小層物性差別較大。正常地層水礦化度值主要集中在150～300g/L,沉積環(huán)境為海相環(huán)境,儲層相鄰地層中富含膏鹽巖,導(dǎo)致現(xiàn)今地層水高礦化度。天然氣中以CH4為主,屬過成熟干氣類型。通過交會圖法和判別分析法有效識別氣、水層,提高了氣、水層識別的準(zhǔn)確率,綜合識別率達(dá)到80%以上。研究區(qū)東部含氣程度較西部強(qiáng),但氣藏連片性差。構(gòu)造起伏、古地貌、鋁土巖展布和儲層非均質(zhì)性等因素是氣、水分布的主要控制因素,分隔層呈條帶狀展布,是控制氣、水分布的直接因素,表現(xiàn)為形成物性極差的分隔層,阻擋天然氣運移。儲層內(nèi)發(fā)育的分隔層使其被劃分為多個氣水單元,在同一個氣水單元中氣層位于地層的上傾方向,并且在分隔層下方形成氣藏,地層水多見于氣水單元的下傾方向。
[Abstract]:The fifth member of Ordovician Majiagou formation in Sulige gas field is mainly carbonate reservoir, which has the characteristics of low porosity and low permeability, strong heterogeneity of reservoir, poor continuity of gas reservoir and complex distribution law of gas and water. In the process of production, the distribution of formation water is serious and the distribution of gas and water needs further study. It is of great significance for further exploration and development of Lower Paleozoic Ordovician reservoirs to study the characteristics of carbonate reservoir in this area, combined with the characteristics of natural gas, formation hydro-geochemical and distribution, and to analyze the distribution law of gas and water and the controlling factors. Based on core observation, thin section of cast body, scanning electron microscope, gas and water phase permeation, the reservoir characteristics of Tsao 2 block are studied, and the geochemical characteristics of natural gas and formation water are analyzed according to the test data of natural gas composition and formation water. Based on the gas test and logging data, the comprehensive identification method of gas and water layer is established to judge the gas bearing property of the reservoir, to study the distribution characteristics of the gas and water layers, and to discuss the controlling factors of the distribution of the gas and water layers. It is considered that the main reservoir space of the reservoir is all kinds of dissolution pore fractures, and the physical properties of each small layer vary greatly. The salinity of normal formation water is mainly concentrated at 150 ~ 300g / L, the sedimentary environment is marine environment, and the adjacent reservoir is rich in gypsum salt rock, which leads to the high salinity of formation water. Natural gas is dominated by CH4, which belongs to over mature dry gas type. The accuracy of gas and water layer recognition is improved by cross plot method and discriminant analysis method. The comprehensive recognition rate is more than 80%. The gas content in the east of the study area is stronger than that in the west, but the gas reservoir continuity is poor. Factors such as tectonic fluctuation, paleogeomorphology, bauxite distribution and reservoir heterogeneity are the main controlling factors of gas and water distribution. Block the flow of natural gas. In the same gas-water unit, the gas layer is located in the updip direction of the formation, and the gas reservoir is formed under the separated layer. The formation water is often found in the downdip direction of the gas-water unit.
【學(xué)位授予單位】：西北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P618.13

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