一种新的断裂破坏泥岩盖层程度的综合研究方法

发布时间：2018-06-29 20:56

本文选题：断裂 + 泥岩盖层　；参考：《吉林大学学报(地球科学版)》2017年06期

【摘要】：为了研究含油气盆地断裂发育区断裂对盖层的破坏及对油气分布的影响,在前人研究的基础上,通过定义断裂综合封闭能力和泥岩盖层综合封闭能力,并计算两者比值,得到断裂对泥岩盖层综合破坏程度的计算方法。通过此计算方法建立了一套新的断裂对泥岩盖层综合破坏程度的研究方法,并将此方法应用于海拉尔盆地贝尔凹陷贝西斜坡呼和诺仁构造F5断裂对大一段泥岩盖层综合破坏程度的研究。结果表明:F5断裂对大一段泥岩盖层综合破坏程度在测点4、6、9、10、11处为较强—强级别,其他测点处均为较弱级别;在盖层受破坏程度较强的测点4、6、9、10、11附近,钻井的含油性为油气显示和无显示,其原因是盖层所受断裂综合破坏程度较大,油气保存程度较低;在盖层受破坏程度较弱的测点1—3、5、7—8、12—15附近,盖层所受断裂综合破坏程度较小,油气保存程度较高,井的含油性为工业油流和低产油流。F5断裂对大一段泥岩盖层的综合破坏程度评价结果与南二段油气显示关系相符,证明此方法用于断裂对泥岩盖层综合破坏程度研究是可行的。
[Abstract]:In order to study the damage of faults to caprock and the influence of faults on oil and gas distribution in oil-bearing basin, the comprehensive sealing ability of faults and the comprehensive sealing ability of mudstone caprock are defined and the ratio of them is calculated on the basis of previous studies. A method for calculating the comprehensive failure degree of mudstone caprock caused by fault is obtained. A new method for studying the comprehensive failure degree of mudstone caprock by fault is established by this method. The method has been applied to study the comprehensive failure degree of mudstone caprock in Bayi slope of Beier depression of Hailaer Basin by F5 fault of Nooren structure. The results show that the comprehensive failure degree of mudstone caprock caused by the W F 5 fault is stronger to the strong grade at the measuring point 4, 6, 9, 10, 10, 11, and to the weaker level at the other survey points, and near the site 4, 6, 9, 10, 10, in which the caprock is damaged. The oil-bearing property of drilling is oil and gas showing and no showing, the reason is that the comprehensive failure degree of the caprock is larger, the degree of oil and gas preservation is lower, and in the vicinity of 1-3Y57-8Y12-15, where the damage degree of the caprock is weak, the oil and gas content of the caprock is lower than that of the caprock. The comprehensive damage degree of caprock is small, and the degree of oil and gas preservation is high. The oil content of wells is that of industrial oil flow and low yield oil flow. F5 fault evaluates the comprehensive damage degree of mudstone caprock in the first member of the formation, which is consistent with the relationship between oil and gas in the second member of South China. It is proved that this method is feasible to study the comprehensive failure degree of mudstone caprock.
【作者单位】：东北石油大学地球科学学院;大庆油田有限责任公司第二采油厂;大庆油田有限责任公司第四采油厂;
【基金】：国家科技重大专项(2016ZX05007-003)~~
【分类号】：P618.13

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