川西氣田開采后期困難井單點增壓工藝研究
發(fā)布時間：2019-03-01 07:52
【摘要】：川西氣田中淺層氣藏已建產(chǎn)能區(qū)塊進入了氣藏開發(fā)中后期,川西致密氣藏大多數(shù)氣井進入低壓生產(chǎn)階段,采輸困難。目前對這些低壓氣井已實施高低壓分輸和整體增壓集輸模式,但在目前集中增壓模式還存在以下問題：(1)集中增壓不能100%覆蓋所有低壓氣井,無法波及的邊遠井仍受管網(wǎng)壓力影響嚴重；(2)已經(jīng)增壓的老區(qū),機組達到最低吸氣壓力,井口廢棄壓力為0.5MPa,具有進一步降低的潛力,而目前集中增壓機組無法滿足。國內(nèi)外針對解決低壓氣井采輸困難問題,提出了三種解決方案,在對川西氣田開生產(chǎn)形勢和氣井生產(chǎn)特點分析的基礎(chǔ)上,提出適應于川西氣田外輸困難井的增壓模式——單點增壓模式。應用節(jié)點系統(tǒng)分析增壓開采后增產(chǎn)潛能及增產(chǎn)潛能影響因素,對比單點增壓增壓開采和自然開采兩種情況下廢棄壓力的降低值及采收率的提高程度,深化對撬裝單點增壓潛力認識。通過選井原則,篩選出在目前集輸模式下需開展單點增壓方案的低壓井,通過對壓縮機工藝參數(shù)敏感性分析及單點增壓氣井生產(chǎn)數(shù)據(jù)統(tǒng)計,確定試驗井區(qū)壓縮機組工況參數(shù)；通過壓縮機組配套設(shè)備研究,及單點增壓先導試驗,優(yōu)選出適合川西工況條件的燃氣驅(qū)動螺桿壓縮機。通過對先導試驗及推廣試驗共20井組95口氣井現(xiàn)場試驗,分析試驗井增壓前后生產(chǎn)運行情況,深化認識了單點增壓技術(shù)特點,在試驗效果評價基礎(chǔ)上,從井站類型、氣井產(chǎn)水、儲層特性及井間干擾四方面分析影響增壓效果原因,進一步完善單點增壓選井原則和注意事項并提出意見和建議,完善單點增壓開采特點,為其它低壓氣田開采提供借鑒。
[Abstract]:The middle and shallow gas reservoirs in West Sichuan gas field have entered into the middle and late stages of gas reservoir development, and most of the gas wells in the tight gas reservoirs in western Sichuan have entered the low pressure production stage, so it is difficult to produce and transport. At present, these low-pressure gas wells have been implemented high-pressure and low-pressure distribution and integrated pressurization gathering mode, but in the current centralized pressurization mode there are still the following problems: (1) centralized pressurization can not cover all low-pressure gas wells by 100%. Remote wells that cannot be swept are still seriously affected by pipe network pressure; (2) in the old area which has been pressurized, the unit reaches the minimum suction pressure, and the abandoned pressure at the wellhead is 0.5 MPA, which has the potential of further reducing, but the centralized turbocharging unit can not be satisfied at present. In order to solve the problem of difficult production and transportation in low pressure gas wells, three solutions are put forward at home and abroad. Based on the analysis of production situation and gas well production characteristics in western Sichuan gas field, A new supercharging mode, single point pressurization mode, is put forward, which is suitable for the difficult wells in West Sichuan gas field. The node system is applied to analyze the potential of increasing production and the influencing factors of the potential of increasing production after supercharging mining, and the reduction of waste pressure and the increase of recovery are compared between single-point pressurized mining and natural mining. Deepen understanding of the potentiality of pry-mount single-point pressurization. Through the principle of well selection, the low-pressure wells which need to develop a single-point pressurization scheme under the current gathering and transportation mode are selected. The gas-driven screw compressor suitable for the working conditions of West Sichuan is optimized through the research on the equipment of compressor unit and the pilot test of single-point pressurization. Through on-the-spot test of 95 wells in 20 well groups in pilot test and popularization test, the production performance of test wells before and after pressurization is analyzed, and the technical characteristics of single point pressurization are deeply understood. On the basis of the evaluation of test effect, the type of well station and the production of water in gas well are analyzed. The reservoir characteristics and inter-well interference are analyzed in order to improve the principle and points for attention of single-point booster well selection, to perfect the characteristics of single-point pressurization production, and to provide reference for other low-pressure gas fields.
【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE37
本文編號：2432231
[Abstract]:The middle and shallow gas reservoirs in West Sichuan gas field have entered into the middle and late stages of gas reservoir development, and most of the gas wells in the tight gas reservoirs in western Sichuan have entered the low pressure production stage, so it is difficult to produce and transport. At present, these low-pressure gas wells have been implemented high-pressure and low-pressure distribution and integrated pressurization gathering mode, but in the current centralized pressurization mode there are still the following problems: (1) centralized pressurization can not cover all low-pressure gas wells by 100%. Remote wells that cannot be swept are still seriously affected by pipe network pressure; (2) in the old area which has been pressurized, the unit reaches the minimum suction pressure, and the abandoned pressure at the wellhead is 0.5 MPA, which has the potential of further reducing, but the centralized turbocharging unit can not be satisfied at present. In order to solve the problem of difficult production and transportation in low pressure gas wells, three solutions are put forward at home and abroad. Based on the analysis of production situation and gas well production characteristics in western Sichuan gas field, A new supercharging mode, single point pressurization mode, is put forward, which is suitable for the difficult wells in West Sichuan gas field. The node system is applied to analyze the potential of increasing production and the influencing factors of the potential of increasing production after supercharging mining, and the reduction of waste pressure and the increase of recovery are compared between single-point pressurized mining and natural mining. Deepen understanding of the potentiality of pry-mount single-point pressurization. Through the principle of well selection, the low-pressure wells which need to develop a single-point pressurization scheme under the current gathering and transportation mode are selected. The gas-driven screw compressor suitable for the working conditions of West Sichuan is optimized through the research on the equipment of compressor unit and the pilot test of single-point pressurization. Through on-the-spot test of 95 wells in 20 well groups in pilot test and popularization test, the production performance of test wells before and after pressurization is analyzed, and the technical characteristics of single point pressurization are deeply understood. On the basis of the evaluation of test effect, the type of well station and the production of water in gas well are analyzed. The reservoir characteristics and inter-well interference are analyzed in order to improve the principle and points for attention of single-point booster well selection, to perfect the characteristics of single-point pressurization production, and to provide reference for other low-pressure gas fields.
【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE37
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