Sensitivity analysis of parameters of affecting open - flow capacity of gas well in changqing gas field 影響長慶氣田氣井無阻流量的參數(shù)敏感性分析
The horizontal well productivity test is mainly to obtain the productivity equation and absolute open - flow capacity , and to select nozzle for production 摘要水平井產(chǎn)能試井主要是求取產(chǎn)能方程和絕對無阻流量,優(yōu)選生產(chǎn)油嘴。
Based on these , the applied conditions for the 4 methods are presented , which is as a guide for determination of open - flow capacity in different oil wells 在此基礎(chǔ)上提出了4種方法的應(yīng)用條件,這對于不同油井確定無阻流量具有重要借鑒意義。
In order to study effects of various factors on gas well productivity , this paper takes changqing gas field as an example and uses gas reservoir engineering and numerical simulation methods to qualify effect of different factors on absolute open - flow capacity in different reservoirs in respect of formation coefficient , water production , non - darcy flow coefficient , formation pressure and skin factor 摘要影響氣井產(chǎn)能的因素多種多樣,為了具體描述各因素對產(chǎn)能的影響,以長慶氣田為例,利用氣藏工程和數(shù)值模擬方法,從地層系數(shù)、產(chǎn)水、非達西流系數(shù)、地層壓力、表皮系數(shù)等幾個方面定量分析了各因素對不同儲層條件下氣井絕對無阻流量的影響程度。
The result shows that 1 ) formation coefficient is a main factor . 2 ) boundary and formation heterogeneity have much effect . 3 ) water producing gas wells should be produced reasonably according to gas production policy with water controlling technique so as to avoid watered out . 4 ) with increase of non - darcy flow coefficient , gas well productivity decreases . 5 ) in the process of gas well production , formation energy should be used reasonably . 6 ) when skin factor increases from 0 to 6 , its open - flow capacity is 60 % - 70 % of that without pollution 研究表明:地層系數(shù)是影響氣井產(chǎn)能的主要因素;邊界和地層非均質(zhì)對氣井產(chǎn)能影響很大;對于產(chǎn)水氣井,應(yīng)嚴(yán)格按照控水采氣技術(shù)政策合理開采,避免水淹;隨著非達西流系數(shù)的增大,氣井產(chǎn)能不斷降低;在氣井的生產(chǎn)過程中,必須合理利用地層能量;當(dāng)表皮系數(shù)由0增加到6時,其無阻流量為不受污染時的60 % ~ 70 % 。