大牛地气田下石盒子组地层压力与天然气富集关系研究
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摘要
大牛地气田开发已进入中后期,气藏剩余潜力预测、动用程度评价逐渐成为老区挖潜的工作核心。以大牛地气田下石盒子组为研究对象,研究不同层系地层压力、天然气分布特征,分析地层压力与天然气富集关系。结果表明,研究区下石盒子组超压主要集中在盒一段、盒三段,盒一段压力系数相对较低,最大值为1.40,超压中心集中在工区中部、北部,该区域天然气较富集;盒三段压力系数较高,工区中部发育规模较大的超压中心,压力系数最大值为1.50,西南部存在低压中心,天然气主要富集在西南部压力系数较低的地区。不同层系地层压力与天然气关系存在明显差异:盒一段天然气分布与地层压力分布关系符合超压控藏理论,地层压力越高,越有利于天然气富集;盒三段天然气分布与地层压力分布关系则相反,压力系数越低,天然气越聚集。
During the middle-later development period in Daniudi Gasfield,the prediction of the remaining potential and the evaluation of the production degree of gas reservoirs have gradually become the core of tapping the potential in the old area.Formation pressure and natural gas distribution characteristics of different strata were studied,and the relationship between the formation pressure and natural gas enrichment was analyzed in Lower Shihezi Formation of Daniudi Gasfield.The results show that overpressure in Lower Shihezi Formation distributes in He1 Member and He3 Member mainly.In He1 Member,the natural gas mainly distributes in the middle and center of the research area at the overpressure center with low pressure coeffi cient(maximum value is 1.40),and the larger overpressure center developed in the middle of the research area with the maximum pressure coefficient of 1.50,low pressure center distributes at southwestern research area,and the natural gas enriches at the southwestern area with low pressure coefficient.The relationship be-tween the formation pressure and the natural gas enrichment in various strata was quite different.The relation-ship in He1 Member accords with overpressure hydrocarbon accumulation theory,that is to say,higher formation pressure is more favorable to the natural gas enrichment.The relationship in He3 Member is in the op-posite,the natural gas enriches at the area with lower pressure coefficient.
During the middle-later development period in Daniudi Gasfield,the prediction of the remaining potential and the evaluation of the production degree of gas reservoirs have gradually become the core of tapping the potential in the old area.Formation pressure and natural gas distribution characteristics of different strata were studied,and the relationship between the formation pressure and natural gas enrichment was analyzed in Lower Shihezi Formation of Daniudi Gasfield.The results show that overpressure in Lower Shihezi Formation distributes in He1 Member and He3 Member mainly.In He1 Member,the natural gas mainly distributes in the middle and center of the research area at the overpressure center with low pressure coeffi cient(maximum value is 1.40),and the larger overpressure center developed in the middle of the research area with the maximum pressure coefficient of 1.50,low pressure center distributes at southwestern research area,and the natural gas enriches at the southwestern area with low pressure coefficient.The relationship be-tween the formation pressure and the natural gas enrichment in various strata was quite different.The relation-ship in He1 Member accords with overpressure hydrocarbon accumulation theory,that is to say,higher formation pressure is more favorable to the natural gas enrichment.The relationship in He3 Member is in the op-posite,the natural gas enriches at the area with lower pressure coefficient.
引文
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[15]刘小琦,邓宏文,李青斌,等.鄂尔多斯盆地延长组剩余压力分布及油气运聚条件[J].新疆石油地质,2007(2):143-145.
[16]齐亚林,惠潇,梁艳,等.平衡深度法恢复鄂尔多斯盆地延长组过剩压力探讨[J].石油地质与工程,2014,28(5):20-22.
[17]HOTTMANN C E,JOHNSON R K.Estimation of Formation Pressures from Log-Derived Shale Properties[J].Journal of Petroleum Technology,1965,17(6):717-722.
[18]秦润森,徐国盛,徐兴友,等.济阳坳陷沾化凹陷古近系沙四段现今压力场特征及其与油气分布的关系[J].石油与天然气地质,2007,28(3):329-336.
[19]贾新峰,杨贤友,周福建,等.孔隙压力预测方法在油气田开发中的应用[J].天然气技术,2009,3(2):31-3.
[20]LIU R,LIU J,ZHU W,et al.In Situ Stress Analysis in the Yinggehai Basin,Northwestern South China Sea:Implication for the Pore Pressure-stress Coupling Process[J].Marine&Petroleum Geology,2016,77:341-352.
[21]谭明友.济阳拗陷地层压力预测方法[J].石油地球物理勘探,2004(3):246-369.
[2]王永建,王延斌.大牛地气田上古生界低渗储层综合评价[J].西南石油大学学报:自然科学版,2013,35(5):57-64.
[3]徐轩,胡勇,万玉金,等.高含水低渗致密砂岩气藏储量动用动态物理模拟[J].天然气地球科学,2015,26(12):2352-2359.
[4]侯瑞云,刘忠群.鄂尔多斯盆地大牛地气田致密低渗储层评价与开发对策[J].石油与天然气地质,2012,33(1):118-128.
[5]蔺龙.靖边气田单井动储量评价及其变化特征分析[D].西安石油大学,2014.
[6]郭建宇,张大林,邓宏文,等.低勘探程度区域油气资源评价方法[J].油气地质与采收率,2006(6):43-45.
[7]庞雄奇,周新源,姜振学,等.叠合盆地油气藏形成、演化与预测评价[J].地质学报,2012,86(1):1-103.
[8]王永建,王延斌,李霞,等.大牛地气田上古生界储层物性差异影响因素[J].石油实验地质,2011,33(5):513-516.
[9]袁东山,李国强,莫贵初,等.鄂尔多斯盆地大牛地气田上古生界烃源岩评价[J].长江大学学报:自然版,2012,9(11):84-87.
[10]曹忠辉,王建淮,郭建民.鄂尔多斯盆地大牛地气田上古生界储层特征[J].断块油气田,2006,13(2):11-13.
[11]常兴浩,王延宾,韩德馨.大牛地气田下石盒子组储层特征[J].天然气工业,2004,24(11):19-21.
[12]王香增.延长探区天然气勘探重大突破及启示[J].石油与天然气地质,2014,35(1):1-9.
[13]卞从胜,柳广弟.异常地层压力的综合预测方法及其在营尔凹陷的应用[J].地质科技情报,2009,28(4):1-6.
[14]罗胜元,何生,金秋月,等.渤南洼陷超压系统划分及结构特征[J].吉林大学学报:地球科学版,2015,45(1):37-51.
[15]刘小琦,邓宏文,李青斌,等.鄂尔多斯盆地延长组剩余压力分布及油气运聚条件[J].新疆石油地质,2007(2):143-145.
[16]齐亚林,惠潇,梁艳,等.平衡深度法恢复鄂尔多斯盆地延长组过剩压力探讨[J].石油地质与工程,2014,28(5):20-22.
[17]HOTTMANN C E,JOHNSON R K.Estimation of Formation Pressures from Log-Derived Shale Properties[J].Journal of Petroleum Technology,1965,17(6):717-722.
[18]秦润森,徐国盛,徐兴友,等.济阳坳陷沾化凹陷古近系沙四段现今压力场特征及其与油气分布的关系[J].石油与天然气地质,2007,28(3):329-336.
[19]贾新峰,杨贤友,周福建,等.孔隙压力预测方法在油气田开发中的应用[J].天然气技术,2009,3(2):31-3.
[20]LIU R,LIU J,ZHU W,et al.In Situ Stress Analysis in the Yinggehai Basin,Northwestern South China Sea:Implication for the Pore Pressure-stress Coupling Process[J].Marine&Petroleum Geology,2016,77:341-352.
[21]谭明友.济阳拗陷地层压力预测方法[J].石油地球物理勘探,2004(3):246-369.
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