階段水驅指數、存水率理論圖版修正及應用

付銘，廖茂林，劉德華

（長江大學 石油工程學院，湖北 武漢 430100）

階段水驅指數、存水率理論圖版修正及應用

付銘，廖茂林，劉德華

（長江大學 石油工程學院，湖北 武漢 430100）

階段存水率、水驅指數理論圖版作為評價水驅油藏效果一種重要模型，在確定油藏合理配水量與井網調整等方面有廣泛應用。由于該模型是含有3個未知變量，因此在實際應用運用過程中，我們通常選擇控制注采比的大小來確定含水率與存水率、水驅指數的變化規律。運用理論圖版對A斷塊砂巖油藏注水開發進行擬合可以看出該圖版無法有效判斷注水效果的合理性。這說明理論圖版適合性有限。為了更好的確定油藏水驅效果，通過水驅油藏注采經驗公式與存水率、水驅指數定義式結合推導出合理注采比下階段存水率、水驅指數與含水率的表達式，應用新的表達式所得到的理論曲線與實際生產曲線趨勢對比，若理論的曲線與實際結果一致，說明水驅有效較好。同時在對A油藏運用過程中，我們還能通過該模型得到油藏水驅開發效果好壞時機，所以相比與理論圖版，新模型更加有效、可靠。

存水率；水驅指數；圖版修正; 水驅評價

Abstract:The theoretical chart of stage water storage rate and water flooding index is an important model to evaluate the effect of water drive reservoir, and it is widely used in determining reasonable water allocation and well pattern adjustment. Since the model contains 3 unknown variables, we usually choose the ratio of injection production ratio to determine the change law of water content, water storage rate and water flooding index in the practical application.Using the theoretical chart to fit the waterflooding development of A fault block sandstone reservoir, it can be seen that this plate can not effectively judge the rationality of water injection effect. This shows that the theoretical plates have limited suitability. In order to better determine the reservoir water flooding effect, the water flooding reservoir injection production formula and water storage rate, water flooding index definition are combined to derive the expressions of stage water storage rate, water flooding index and water content under reasonable injection production ratio, the theoretical curves obtained by the new expressions are compared with the actual production curves. If the theoretical curve is in accord with actual results, the water flooding effect is good. At the same time, its application in A reservoir shows that we can get the time and opportunity of reservoir water flooding development by this model. Therefore, the

new model is more effective and reliable than the theoretical chart.

Key words:Water storage rate; Water drive index; Plate correction; Water drive evaluation

注水作為砂巖開發核心技術，準確有效地獲得油藏開發效果可以進一步指導油藏井網部署及調整，從而提高油藏經濟效益。石油行業最規范開發指標有含水上升率、產量遞減率、存水率、地層壓力、水驅儲量控制程度和水驅儲量動用程度[1]。……