本文選題：特低滲氣藏 + 氣井出水��； 參考：《重慶科技學(xué)院》2015年碩士論文

【摘要】：水源識(shí)別是認(rèn)識(shí)氣藏氣水活動(dòng)規(guī)律、調(diào)整合理生產(chǎn)制度、制定相應(yīng)治水措施的關(guān)鍵。蘇東41-33氣藏是典型的“三低”氣藏，投產(chǎn)前實(shí)施整體壓裂改造，改造后天然裂縫與人工裂縫交錯(cuò)，導(dǎo)致氣井出水異常。在快速投產(chǎn)、高速開發(fā)過程中，現(xiàn)場(chǎng)很少實(shí)施生產(chǎn)測(cè)井，由于缺少生產(chǎn)測(cè)井資料，導(dǎo)致氣水界面無法確定，出水水源類型難以判斷，進(jìn)而造成治水措施選擇不準(zhǔn)、大量氣井暴性出水甚至停產(chǎn)。因此，準(zhǔn)確識(shí)別出水水源成為該氣藏急需解決的關(guān)鍵問題。 針對(duì)蘇東41-33氣藏缺乏生產(chǎn)測(cè)井資料等問題，提出了水源識(shí)別方法： 在統(tǒng)計(jì)氣藏產(chǎn)水、產(chǎn)氣變化情況基礎(chǔ)上，利用現(xiàn)有生產(chǎn)資料，應(yīng)用生產(chǎn)動(dòng)態(tài)資料法、完井測(cè)井解釋法、生產(chǎn)水氣比法、產(chǎn)出水礦化度法等，對(duì)出水水源進(jìn)行了初步識(shí)別，并結(jié)合水侵方式及布井位置，劃分了4個(gè)不同出水特征的井組； 提出以水侵參數(shù)變化特征代替生產(chǎn)測(cè)井資料的方法驗(yàn)證初識(shí)別準(zhǔn)確性。利用物質(zhì)平衡原理，對(duì)各井組進(jìn)行水體能量、水侵量及水體活躍程度綜合性評(píng)價(jià)，通過分析各井組水侵參數(shù)的大小及變化趨勢(shì)，并與各類水源特有的水侵規(guī)律進(jìn)行對(duì)比驗(yàn)證，準(zhǔn)確識(shí)別了各氣井出水類型； 通過巖心水驅(qū)實(shí)驗(yàn)及出水特征分析，對(duì)不同出水類型氣井的日產(chǎn)水、水氣比、礦化度、含水飽和度、泥質(zhì)含量、水侵特征等參數(shù)進(jìn)行篩選、分類、統(tǒng)計(jì)，結(jié)合現(xiàn)場(chǎng)專家意見，制定了適合蘇東氣田的水源快速識(shí)別標(biāo)準(zhǔn)。 利用水源識(shí)別結(jié)果，根據(jù)不同水源的生產(chǎn)動(dòng)態(tài)特征及水侵特征，提出了不同水源井分類治理對(duì)策： 邊水水源井以控水穩(wěn)產(chǎn)為主，后期輔以排采工藝，通過建立氣水兩相穩(wěn)定界面流動(dòng)模型，確定了合理壓差及配產(chǎn)；層間水水源井以控水為主，采用Chaperson方法對(duì)臨界產(chǎn)量進(jìn)行了優(yōu)化；層內(nèi)水以排水采氣為主要手段。 在進(jìn)行排采工藝優(yōu)選時(shí)，通過現(xiàn)場(chǎng)應(yīng)用對(duì)比，優(yōu)選了李閔橢球模型作為該氣藏氣井臨界攜液流量模型；在各排采工藝適應(yīng)性分析基礎(chǔ)上，從井筒特征、生產(chǎn)動(dòng)態(tài)特征、地層特征等條件入手，初選排采工藝，，并考慮工藝成本的經(jīng)濟(jì)指標(biāo)，最終優(yōu)選出適合該區(qū)塊目前生產(chǎn)情況的泡排、優(yōu)選管柱等排采工藝。 現(xiàn)場(chǎng)應(yīng)用表明，蘇東氣田水源快速識(shí)別標(biāo)準(zhǔn)能夠快速、有效的識(shí)別氣井水源，提出的治水對(duì)策合理可行。但是，此標(biāo)準(zhǔn)更多的是結(jié)合現(xiàn)場(chǎng)經(jīng)驗(yàn)總結(jié)而來，還沒有形成完善的數(shù)據(jù)庫系統(tǒng)作為支撐，其準(zhǔn)確性仍然有待提高。
[Abstract]:The identification of water source is the key to understand the law of gas-water activity in gas reservoir, adjust the reasonable production system, and formulate the corresponding water control measures. Sudong 41-33 gas reservoir is a typical "three low" gas reservoir. Before putting into production, the integral fracturing was carried out, after which natural fracture and artificial fracture interlaced, which resulted in abnormal water flow of gas well. In the process of rapid production and high speed development, production logging is seldom carried out on the spot. Due to the lack of production logging data, the gas-water interface can not be determined, the type of water source is difficult to judge, and the choice of water control measures is not correct. A large number of gas well burst water even shut down. Therefore, accurate identification of water source has become the key problem for the gas reservoir to be solved urgently. In view of the lack of production logging data in the 41-33 gas reservoir in eastern Jiangsu Province, a water source identification method is proposed. On the basis of statistics on the changes of water and gas production in gas reservoirs, using the existing means of production, the method of production dynamic data, the well completion log interpretation method, the ratio of production water to gas, the salinity of producing water, etc., the primary identification of the water source is carried out. Combined with the water invasion mode and the location of well layout, four wells with different effluent characteristics were divided. The accuracy of initial identification is verified by replacing the production logging data with the variation characteristics of water invasion parameters. Based on the principle of material balance, the water energy, water invasion and water activity degree of each well group are comprehensively evaluated. By analyzing the size and variation trend of water invasion parameters of each well group, and comparing it with the special water erosion law of various water sources, the paper makes a comprehensive evaluation of the water body energy, water invasion amount and water activity degree of each well group. The types of outlet water of each gas well are identified accurately. Through the core water drive experiment and the analysis of the effluent characteristics, the parameters such as daily water production, water / gas ratio, salinity, water saturation, mud content and water invasion characteristics of gas wells of different effluent types are screened, classified, counted, and combined with the opinions of experts on the spot. The rapid identification standard of water source suitable for Sudong gas field has been established. Based on the results of water source identification and according to the production dynamic characteristics and water invasion characteristics of different water sources, the classification and treatment countermeasures of different water source wells are put forward. Side water source wells are dominated by water control and stable production, followed by drainage process in late stage. Reasonable pressure difference and distribution are determined by establishing gas-water two-phase stable interface flow model, and water control is dominant in interlayer water source wells. The Chaperson method is used to optimize the critical production, and the main method of water in the layer is drainage gas production. In the optimum selection of drainage production technology, through field application comparison, Li Min ellipsoid model is selected as the critical fluid carrying flow model of gas well, and on the basis of adaptability analysis of each drainage production process, the characteristics of wellbore and production performance are analyzed. Considering the economic index of the process cost, the bubble row suitable for the current production situation of the block and the optimum drainage technology such as pipe string are selected. The field application shows that the rapid identification standard of water source in Sudong gas field can identify the source of gas well quickly and effectively, and the water control measures proposed are reasonable and feasible. However, this standard is more based on the field experience, there is no perfect database system as the support, its accuracy still needs to be improved.
【學(xué)位授予單位】：重慶科技學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE358

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