本文關(guān)鍵詞： 靖邊氣田 排水采氣 泡沫排水 泡排劑 氣井分類　出處：《西安石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：靖邊氣田屬于低壓、低滲、低產(chǎn)氣田,各區(qū)塊氣井都有不同程度產(chǎn)水情況存在。近年來,油田開展了各種排水采氣方法研究,尤其是泡沫排水采氣技術(shù)的推廣應(yīng)用,取得了較好的排水效果。但隨著地層壓力降低、產(chǎn)水井?dāng)?shù)量增加和地層水質(zhì)變化,導(dǎo)致泡沫排水采氣效果差別很大,迫切需要根據(jù)產(chǎn)水氣井工況條件、水質(zhì)特征和泡排劑性能開展不同氣井泡沫排水采氣工藝優(yōu)化技術(shù)研究。本文在對靖邊氣田開發(fā)現(xiàn)狀、產(chǎn)水原因和泡排效果調(diào)研、分析的基礎(chǔ)上,采用化學(xué)容量法和儀器分析相結(jié)合的方法,對不同氣井產(chǎn)出水的組成性質(zhì)進(jìn)行了綜合分析,并對各種泡沫性能評價方法的優(yōu)缺點(diǎn)、適用范圍等進(jìn)行了分析研究,同時開展了泡排劑性能評價方法研究,最后采用泡排劑評價新方法,詳細(xì)分析研究了泡沫排水采氣的影響因素和凝析油、甲醇、礦化度等對泡排劑性能的影響;確定出了適合不同產(chǎn)水氣井的泡排劑種類、加量和泡沫排水采氣工藝。研究結(jié)果表明:(1)采用標(biāo)準(zhǔn)中的靜態(tài)(Ross-Miles法)和動態(tài)(SY/T5761-1995《排水采氣用起泡劑CT5-2》法進(jìn)行泡排劑性能評價的優(yōu)點(diǎn)是簡單、快速,但缺點(diǎn)是評價指標(biāo)單一、片面,相互之間無法關(guān)聯(lián);改進(jìn)的評價方法能系統(tǒng)全面地評價泡排劑的各種性能;(2)通過測定泡沫含水率隨時間變化和泡沫攜液率隨流速變化更能反應(yīng)泡排劑的性能;(3)影響泡排劑性能的關(guān)鍵因素是凝析油、甲醇、礦化度等;(4)泡排劑的耐鹽性能適用條件:1#200g/L;2#100g/L;3#20g/L;4#100g/L;5#50g/L;(5)泡排劑的耐油性能適應(yīng)條件:1#10%;2#2.5%;3#2.5%;4#5%;5#2.5%;(6)泡排劑的耐甲醇性能適應(yīng)條件:1#20%;2#20%;3#10%;4#30%;5#30%;(7)氣井分類按水質(zhì)總礦化度分高(100g/L)、中(100g/L且50g/L)、低(50g/L)三類,每一類再依據(jù)凝析油含量細(xì)分為高(2.5%且10%)和低(≤2.5%)兩類;(8)低礦化度低凝析油氣井選擇3#和5#泡排劑,低礦化度高凝析油氣井選擇1#和4#泡排劑,中礦化度低凝析油氣井選擇2#泡排劑,中礦化度高凝析油氣井選擇4#泡排劑,高礦化度低(高)凝析油氣井選擇1#泡排劑;(9)根據(jù)氣井井況,選擇藥劑加注濃度、方式、周期,優(yōu)化靖邊氣田不同氣井的泡沫排水采氣工藝技術(shù)。
[Abstract]:Jingbian gas field belongs to low pressure, low permeability and low production gas field, and the gas wells in each block have different degree of water production. In recent years, the oilfield has carried out research on various drainage gas recovery methods, especially the popularization and application of foam drainage gas recovery technology. But with the decrease of formation pressure, the increase of the number of wells produced and the change of formation water quality, the effect of foam drainage and gas recovery is very different, so it is urgent to base on the working conditions of water and gas production wells. The water quality characteristics and foam drainage agent performance of different gas wells are studied on the basis of the investigation and analysis of the present development situation, water production cause and bubble drainage effect of Jingbian gas field. By means of chemical capacity method and instrument analysis, the composition properties of water produced from different gas wells are comprehensively analyzed, and the advantages and disadvantages of various foam performance evaluation methods and their applicable scope are analyzed and studied. At the same time, the performance evaluation method of foam drainage agent was studied. Finally, the influence factors of foam drainage gas recovery and the effects of condensate oil, methanol and salinity on the performance of foam discharge agent were analyzed in detail by using the new method of foam drainage agent evaluation. The types of foam discharge agents suitable for different water and gas production wells have been determined. The research results show that the static Ross-Miles method of the standard and the dynamic SYP T5761-1995 method for evaluating the performance of foaming agent for drainage gas extraction are simple and rapid, but the disadvantages are that the evaluation index is single and one-sided. Not related to each other; The improved evaluation method can systematically and comprehensively evaluate the various properties of foam effluents. Condensate oil is the key factor that affects the performance of foam effluents by measuring the change of foam water content with time and foam carrying rate with flow rate. Suitable conditions for Salt tolerance of Bubble effluents: 1 / #200g / L / L / 2 #100g / L / L 3#20g / L / L 4#100g / L / L 4#100g / L / L / 5 #50g / L ~ (5)) Oil tolerance of foam draining agents: 1: 10 #2 #2.53#2.535 / 4 #52.5 / 4#52.5 / 5) the methanol performance of the foam draining agent adapts to the conditions of methanol tolerance of 1 #20g / L #20 / 2 #20 / L #2020 / L #2020 / 2 #20 / #30 #30 #5 #30g / L / L / 4 #20g / L / 4 #20 / 2 #20g / L #20 / 2 #20g / L #20g / L / #20g / L #20g / L #20g / L #20g / L #20g / L #20g / L #20g / L #20g / L #20g / L #20g / L #20g / L #20g / L #20g / L #20g / L 4#20g / L #20g / L. Each type is further subdivided into two categories according to the condensate oil content: high 2.5% and 10%) and low (鈮，

本文編號：1532101