發(fā)布時間：2018-08-17 10:04

【摘要】：扶余油田是一個非均質(zhì)嚴(yán)重的裂縫性中低滲透淺層砂巖油藏,目前,扶余油田已進(jìn)入密井網(wǎng)高含水開發(fā)階段,而扶余油田東區(qū)由于水油流度比相對較大,開發(fā)難度越來越大。壓裂一直是扶余油田主體增產(chǎn)措施,壓裂效果不理想對扶余東區(qū)穩(wěn)產(chǎn)造成一定影響。因此,綜合地質(zhì)、生產(chǎn)動態(tài)、壓裂施工等相關(guān)資料進(jìn)行多因素評判分析,進(jìn)行多參數(shù)優(yōu)化,尋求一種更加適合扶余油田密井網(wǎng)高含水條件下的壓裂技術(shù),從而提高壓裂增產(chǎn)效果,為扶余穩(wěn)產(chǎn)具有重要的作用。因此,為了提高單井壓后產(chǎn)量,實現(xiàn)該區(qū)井穩(wěn)油控水的目的。本研究首先基于壓裂改造產(chǎn)量沒有太大變化的井作為參考井,其他壓裂改造井與其對比分析,從地質(zhì)因素和工程因素兩個方面分析了影響壓裂井改造效果的主次矛盾,從而為選井壓裂增產(chǎn)改造提供一定的技術(shù)支持。然后建立了近井地帶地應(yīng)力場模型,利用二次壓裂理論,得到了扶余東區(qū)壓裂井的地應(yīng)力場與儲層深度之間的關(guān)系模型,為明確后續(xù)人工裂縫和天然裂縫之間的相互關(guān)系奠定理論基礎(chǔ)。其次,建立了人工裂縫和天然裂縫形成最小開啟能量力學(xué)模型,結(jié)合扶余油田東區(qū)地應(yīng)力場模型,得到了扶余油田人工裂縫和天氣裂縫開啟的臨界力學(xué)條件。最后綜合本論文研究成果,對比扶余油田現(xiàn)行的壓裂工藝(全程加砂壓裂、二次加砂壓裂、壓前投球壓裂、壓中投球壓裂)對壓后產(chǎn)量的影響,提出了適合于扶余油田密井網(wǎng)高含水條件下的儲層壓裂改造優(yōu)化技術(shù)。
[Abstract]:Fuyu Oilfield is a fractured low permeability shallow sandstone reservoir with serious fracture. At present, Fuyu Oilfield has entered the stage of dense well pattern high water cut development, while the eastern part of Fuyu Oilfield is becoming more and more difficult because of the relatively large water / oil mobility ratio. Fracturing has always been the main measure to increase production in Fuyu Oilfield, and the unsatisfactory fracturing effect has a certain effect on the stable production in the eastern part of Fuyu. Therefore, comprehensive geological, production performance, fracturing operation and other related data are analyzed by multi-factor evaluation and multi-parameter optimization, in order to find a more suitable fracturing technology under the condition of dense well pattern with high water cut in Fuyu Oilfield. In order to improve the effect of fracturing, it plays an important role in Fuyu stable production. Therefore, in order to improve the production after single well pressure, the purpose of stabilizing oil and controlling water in this area is realized. Firstly, based on the wells with no great change in fracturing production, the main and secondary contradictions affecting the effect of fracturing wells are analyzed in terms of geological factors and engineering factors through the comparative analysis of other fracturing wells. Thus, it can provide certain technical support for fracturing and improving well selection. Then the model of in-situ stress field in the near well zone is established, and the model of the relationship between the in-situ stress field and reservoir depth of the fracturing well in the eastern area of Fuyu is obtained by using the secondary fracturing theory. It lays a theoretical foundation for clarifying the relationship between artificial fracture and natural fracture. Secondly, the minimum open energy mechanics model of artificial fracture and natural fracture is established, and the critical mechanical conditions of artificial fracture and weather fracture are obtained by combining with the model of ground stress field in the eastern part of Fuyu Oilfield. Finally, by synthesizing the research results of this paper, the effects of the current fracturing techniques (whole sand fracturing, secondary sand fracturing, pre-press ball fracturing, mid-pressure ball throwing fracturing) on the post-pressure production in Fuyu Oilfield are compared. The optimization technology of reservoir fracturing under the condition of dense well pattern and high water cut in Fuyu Oilfield is put forward.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE357.1

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本文編號：2187265