【摘要】：普光氣田是我國實施“川氣東送”的主供氣源,具有埋藏深、儲層非均質(zhì)性強、氣水關系復雜等特點。普光主體氣藏2009年10月投入開采,隨著開采的進行,邊部氣井液氣比逐漸攀升,邊水水侵已經(jīng)成為制約氣田高效開發(fā)的主要問題之一,因此開展邊水水侵對氣藏開發(fā)動態(tài)影響研究具有重要意義。論文以滲流力學、氣藏工程、數(shù)值模擬等理論為基礎,結合生產(chǎn)動態(tài)數(shù)據(jù),正確認識普光主體水體體積大小,水體活躍程度,摸清氣藏水侵規(guī)律,預測氣藏水侵動態(tài),并提出了合理控水措施。主要研究方法和取得成果如下：(1)運用容積法、氣藏工程、數(shù)值模擬等方法確定氣藏水體體積,水侵量,評價水體活躍程度。氣藏水體倍數(shù)為4.5倍,水體活躍程度為較活躍,氣藏水體局部活躍程度不同,103、105井區(qū)表現(xiàn)為強水侵特征。(2)建立了數(shù)值模型,進行精細歷史擬合,運用數(shù)值模擬方法研究氣藏水侵特征。縱向上展示了TSQ1 Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ層序水侵狀況,TSQ1Ⅲ層序水侵嚴重、氣水界面局部突進,TSQ1Ⅳ層序次之。氣藏產(chǎn)水高峰期為2016至2021年,2020年平均日水侵量最大,為1.56x 104m3/d。選取合適數(shù)學模型計算受水侵影響的邊部氣井合理配產(chǎn),結果顯示,16口受水侵影響的邊部氣井,合理配產(chǎn)主要在15×104m3/d～20×l04m3/d之間。(3)從產(chǎn)能、穩(wěn)產(chǎn)期和可采儲量三個方面,評價水侵對開發(fā)效果的影響。結合液氣比,巖心相滲數(shù)據(jù),計算井周滲透性變差造成的產(chǎn)能下降程度。數(shù)值模擬結果顯示,氣藏穩(wěn)產(chǎn)期較出水前下降半年。(4)提出四種控水方案,運用數(shù)值模擬方法進行綜合指標對比,結果顯示,目前邊部氣井限產(chǎn)和堵水兩種方案比較合理。
[Abstract]:Puguang gas field is the main source of gas supply for "Sichuan gas transmission to the east" in China, which has the characteristics of deep burial, strong reservoir heterogeneity, complex gas-water relationship and so on. Puguang main gas reservoir was put into production in October 2009. With the development of exploitation, the liquid-gas ratio of edge gas wells is gradually rising, and edge water invasion has become one of the main problems restricting the efficient development of gas fields. Therefore, it is of great significance to study the influence of edge water invasion on gas reservoir development performance. Based on the theories of seepage mechanics, gas reservoir engineering and numerical simulation, combined with the production performance data, this paper correctly understands the volume size and active degree of Puguang main water body, finds out the law of water invasion in gas reservoirs, and forecasts the water invasion performance of gas reservoirs. The reasonable water control measures are put forward. The main research methods and achievements are as follows: (1) using volume method, gas reservoir engineering, numerical simulation and other methods to determine the volume of gas reservoir water body, water invasion, and evaluate the active degree of water body. The water body multiple of gas reservoir is 4.5 times, and the active degree of water body is more active. The local activity degree of gas reservoir water body is different, and the 103105 well area shows the characteristics of strong water invasion. (2) the numerical model is established and the fine history fitting is carried out. The characteristics of water invasion in gas reservoir are studied by numerical simulation method. Longitudinally, it shows that the water invasion of TSQ1 鈪，

本文編號：2492683