本文關(guān)鍵詞： 渤海灣盆地 南堡凹陷 古近紀 斷層巖 封閉性 演化階段 確定方法 壓實成巖時間 封閉能力形成時間　出處：《天然氣工業(yè)》2017年10期 　論文類型：期刊論文

【摘要】：為了準確確定斷裂的封閉性,在對斷層巖形成過程及封閉性演化特征進行研究的基礎(chǔ)上,根據(jù)斷層巖開始壓實成巖時間和封閉能力形成時間把斷層巖封閉性演化劃分為3個階段:(1)壓實不封閉階段,時間從斷裂停止活動至斷層巖開始壓實成巖;(2)成巖弱封閉階段,時間從斷層巖開始壓實成巖至封閉能力形成;(3)成巖強封閉階段,時間從斷層巖封閉能力形成至現(xiàn)今。由此建立了一套斷層巖封閉性演化階段的確定方法,并將其應(yīng)用于渤海灣盆地南堡凹陷南堡5號構(gòu)造,以確定該構(gòu)造內(nèi)的f_1、f_2、f_3這3條斷裂在古近系東營組三段(以下簡稱東三段)斷層巖中的封閉性演化階段。結(jié)果表明:(1)f_1斷裂在東三段斷層巖封閉性演化目前處于第1封閉性演化階段,即壓實不封閉階段,不利于油氣的聚集與保存;(2)f_2、f_3斷裂在東三段斷層巖封閉性演化目前均處于第3封閉性演化階段,即成巖強封閉階段,有利于油氣的聚集與保存。結(jié)論認為:該方法確定的結(jié)果與目前該構(gòu)造f_1、f_2、f_3斷裂兩側(cè)東三段已發(fā)現(xiàn)的油氣分布規(guī)律相吻合,表明采用該方法來確定斷層巖封閉性演化階段是可行的。
[Abstract]:In order to accurately determine the sealing characteristics of faults, based on the study of the formation process and sealing evolution characteristics of fault rocks, According to the time of starting compaction diagenesis and forming time of sealing ability of fault rock, the evolution of sealing property of fault rock is divided into three stages: 1) compaction and no sealing stage, from the time of fault stopping activity to the stage of diagenetic weak sealing of fault rock beginning to compaction diagenesis. The time begins from the fault rock compaction to the formation of the sealing ability to form the diagenetic strong sealing stage, and the time from the fault rock sealing ability to the present day. Therefore, a set of methods for determining the sealing evolution stage of the fault rock are established. It has been applied to Nanbao No.5 structure in Nanpu Sag, Bohai Bay Basin. In order to determine the closed evolution stage of the three faults in the third member of the Dongying formation of the Paleogene (hereinafter referred to as the third member of the eastern third member), the sealing evolution of the fault rocks in the third member of the Dongying formation is in the first place. The results show that the sealing evolution of the fault rocks in the third member of the eastern third member is now in the first place. Closed evolution stage, That is, the compaction and non-sealing stage is not conducive to the accumulation and preservation of oil and gas. The sealing evolution of the fault rocks in the third member of the eastern part is now in the third stage, that is, the stage of strong diagenetic sealing, which is not conducive to the accumulation and preservation of oil and gas. Conclusion: the results obtained by this method are consistent with the oil and gas distribution pattern found in the eastern third member of the f1D / fSZ _ 2fSP _ 3 fault in the present structure, and the conclusion is that this method is suitable for the accumulation and preservation of oil and gas. It shows that it is feasible to use this method to determine the closed evolution stage of fault rock.
【作者單位】： 東北石油大學;
【基金】：國家自然科學基金項目“油源斷裂轉(zhuǎn)換帶優(yōu)勢輸導油氣條件研究”(編號:41372153)
【分類號】：P618.13

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