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  本文選題：大洼油田 + 水淹層解釋��； 參考：《東北石油大學(xué)》2015年碩士論文

【摘要】：本文是以L油田四個區(qū)塊之一的大洼油田中后期開發(fā)水淹層測井解釋為重點進行研究工作的。大洼油田儲層條件復(fù)雜,注水開發(fā)時期較早,地下水電阻率變化異常。在實行了注水開發(fā)方式進行開采以后,各儲層的含水率迅速上升,導(dǎo)致注入水在地層的推進過程中水淹狀況出現(xiàn)了很大的差異。測井曲線響應(yīng)差異很大,常規(guī)測井方法很難進行高精度的測井解釋。本篇論文以大洼地區(qū)地質(zhì)特征為基礎(chǔ),以該區(qū)儲層水淹前后特征改變?yōu)榍疤?開展了大洼地區(qū)水淹機理的研究,為后續(xù)的測井解釋工作提供了可靠保障。經(jīng)過大洼水淹機理研究以后,歸納出各個測井曲線的響應(yīng)規(guī)律、變化梯度以及在水淹狀況不同情況下地下儲層的特征,將其匯入數(shù)據(jù)庫,以此為基礎(chǔ),根據(jù)沉積砂體具體特征劃分出基本解釋單元。通過建立的空間狀態(tài)模型,在劃分出的基本解釋單元內(nèi)根據(jù)多個測井資料的變化趨勢和卡爾曼增益值來確定該系統(tǒng)內(nèi)各個油層之間水淹情況的改變方向從而成功實現(xiàn)了儲層水淹狀況的定性判別。在完成水淹級別的定性判斷以后,利用多重迭代遞歸這一數(shù)學(xué)方法,在建立起來的改良后的雙地層水電阻率模型內(nèi),計算儲層各個重點參數(shù),最終完成了大洼地區(qū)水淹層測井解釋研究。本文利用該方法對區(qū)塊內(nèi)兩口取心井的資料進行處理解釋,并與巖心分析資料對比,符合率為73.18%。
[Abstract]:This paper focuses on the logging interpretation of water flooded zones in Dawa Oilfield, one of the four blocks in L Oilfield. The reservoir conditions in Dawa Oilfield are complex, the water injection development period is earlier, and the groundwater resistivity is abnormal. After the water injection development is carried out, the water cut of each reservoir increases rapidly, which leads to great differences in the waterflooding situation in the process of the injection water in the formation. The response of log curve is very different, so it is difficult for conventional logging method to interpret well with high precision. Based on the geological characteristics of Dawa area and the change of reservoir characteristics before and after flooding, this paper has carried out a study on the mechanism of flooding in Dawa area, which provides a reliable guarantee for the subsequent logging interpretation work. After studying the mechanism of flooding in Dawa, the response law of various logging curves, the changing gradient and the characteristics of underground reservoir under different conditions of water flooding are summarized. The basic interpretation unit is divided according to the specific characteristics of sedimentary sand body. By building a spatial state model, According to the variation trend of multiple logging data and the Kalman gain value, the direction of the change of the water flooding situation among the oil layers in the system is determined in the divided basic interpretation unit, and the qualitative judgement of the reservoir water flooding condition is successfully realized. After the qualitative judgment of water flooding level is completed, the mathematical method of multiple iterations recursion is used to calculate the key parameters of reservoir in the improved water resistivity model of double formation. Finally, the logging interpretation of flooded zones in Dawa area was completed. In this paper, the data of two coring wells in the block are processed and interpreted by this method, and compared with the core analysis data, the coincidence rate is 73.18.
【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】：TE357.6;P631.81

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本文編號：2029677