本文關(guān)鍵詞：斷層側(cè)向封閉性泥質(zhì)含量法及其應(yīng)用中存在問題分析　出處：《東北石油大學(xué)》2017年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 斷層帶內(nèi)部結(jié)構(gòu) 斷層側(cè)向封閉機理 斷層巖泥質(zhì)含量預(yù)測方法 斷層古側(cè)向封閉性評價方法 失利井分析

【摘要】：根據(jù)斷層側(cè)向封閉機理可知,斷層能否側(cè)向遮擋油氣,主要取決于斷層巖泥質(zhì)含量的多少。截止到目前,關(guān)于斷層側(cè)向封閉能力的定量評價方法主要是斷層泥比率法(SGR),該算法綜合考慮了各種地質(zhì)因素,進而能夠更真實地反映斷層巖的泥質(zhì)含量。在利用斷層巖泥質(zhì)含量(SGR)評價斷層側(cè)向封閉性時,應(yīng)根據(jù)研究區(qū)內(nèi)不同地質(zhì)條件,而采用相應(yīng)斷層側(cè)向封閉能力評價方法,主要可分為三類:(1)在研究區(qū)無已知油水界面斷圈的地質(zhì)條件下,建立了斷層巖泥質(zhì)含量下限(SGRllt)法,來評價研究區(qū)內(nèi)斷層側(cè)向封閉油氣的能力;(2)在研究區(qū)內(nèi)存在一個或少量已知油水界面斷圈的地質(zhì)條件下,建立了改進后的Yielding斷層巖泥質(zhì)含量預(yù)測油柱高度法(SGRllt~H),來評價研究區(qū)內(nèi)斷層側(cè)向封閉油氣的能力;(3)在研究區(qū)存在多個或大量已知油水界面斷圈的地質(zhì)條件下,建立了斷層巖泥質(zhì)含量~油氣柱高度關(guān)系統(tǒng)計法,來評價研究區(qū)內(nèi)斷層側(cè)向封閉油氣的能力。應(yīng)用上述三種不同的斷層巖泥質(zhì)含量法對束鹿西斜坡、文安斜坡、渤中28-2S/N和渤中34-1/N地區(qū)斷層側(cè)向封閉性進行評價,存在個別斷圈側(cè)向封閉油氣的能力與油氣的實際分布呈不吻合現(xiàn)象。造成這種現(xiàn)象的因素主要有兩種:(1)油氣成藏期斷層古側(cè)向封閉能力弱造成斷圈鉆井失利:針對這種情況,通過恢復(fù)油氣成藏期古地層厚度、古斷距大小、以及斷移地層內(nèi)古泥質(zhì)含量,結(jié)合斷層巖泥質(zhì)含量SGR算法,便可建立一套油氣成藏期斷層古側(cè)向封閉能力恢復(fù)方法。并利用該方法對文13斷圈的古側(cè)向封閉能力進行定量評價,其預(yù)測結(jié)果與文13井含油氣性相吻合,證明了該方法用于定量評價斷層古側(cè)向封閉性是可行的;(2)斷層后期活動造成斷圈鉆井失利:針對這種情況,通過恢復(fù)油氣成藏期之后斷層活動速率,來反映斷層后期活動對早期形成的封閉斷層的破壞作用。并通過對比齊家-鴛鴦溝地區(qū)錦24和錦33斷圈油氣成藏期之后控圈斷層活動速率大小,結(jié)果表明錦24斷圈的控圈斷層F2成藏期后活動強度明顯大于錦33斷層圈閉處斷裂活動強度,使其實際封油氣能力范圍變小,造成錦24斷層圈閉內(nèi)鉆井失利。
[Abstract]:According to the mechanism of fault lateral sealing, whether the fault can block oil and gas laterally depends mainly on the content of fault gouge. Up to now. The quantitative evaluation method of fault lateral sealing ability is mainly fault gouge ratio method (SGRN), which considers all kinds of geological factors synthetically. In order to reflect the gouty content of fault rock more truthfully, different geological conditions should be taken into account in evaluating fault lateral sealing by using fault rock gouty content and SGR. The evaluation method of the lateral sealing ability of the corresponding faults can be divided into three types: 1) under the geological conditions of no known oil-water interface fault circle in the study area. The lower limit of shale content in fault rock is established to evaluate the ability of lateral sealing of oil and gas from faults in the study area. 2) under the geological condition of one or a little known oil-water interfacial fault zone in the study area, an improved method of predicting the oil column height of Yielding fault mudstone has been established. To evaluate the ability of fault lateral sealing oil and gas in the study area; 3) under the geological conditions where there are many or a large number of known oil-water interfacial fault zones in the study area, a statistical method for the relationship between the shale content of fault rock and the height of oil and gas column is established. To evaluate the ability of fault lateral sealing oil and gas in the study area. Using the above three different fault shale content method to the West Slope of Shulu, Wenan Slope. The lateral sealing of faults in the area of 28-2S / N and 34-1 / N in Bozhong is evaluated. The ability of lateral sealing of oil and gas in some fault circles does not coincide with the actual distribution of oil and gas. There are two main factors that cause this phenomenon. Weak paleo-lateral sealing ability of faults in oil-gas accumulation period resulted in failure of fault-ring drilling: in view of this situation. By restoring paleostratigraphic thickness, paleo-fault distance and paleo-argillaceous content in faulted strata during hydrocarbon accumulation period, combined with SGR algorithm of fault mudstone content. The method can be used to quantitatively evaluate the paleo-lateral sealing ability of fault in Wen13 fault circle, and the prediction results are in agreement with the petroliferous property of well Wen13. It is proved that this method is feasible for quantitative evaluation of paleo-lateral sealing of faults. 2) failure of fault circle drilling due to late fault activity: in view of this situation, fault activity rate after oil and gas accumulation period is restored. To reflect the failure of the late fault activity to the early formation of the closed fault, and through the comparison of Jijia-Yuanyanggou area, Jin24 and Jin33 fault cycle oil and gas accumulation period after the control fault activity rate. The results show that the activity intensity of the fault F2 in the Jin24 fault circle is obviously greater than that in the fault trap of Jin33, which makes the range of actual sealing ability of oil and gas become smaller. The failure of drilling in Jin24 fault trap was caused.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2017
【分類號】：P618.13

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