龙头——吊钟坝石炭系气藏影响开发效果的主要因素分析
|
摘要
川东大池干井构造带龙头─吊钟坝石炭系气藏从1997年开始转入正规开发以来,随着气藏的开采,气藏产能的递减速度较快,达不到开发设计预期的开发效果,降低了气藏开发的经济效益。为减缓气藏递减速度,延长气藏采气周期,提高气藏开发的经济效益,通过对该气藏地质开发特征的分析,对影响气藏开发效果的主要原因进行了较为深入的剖析。认为气藏构造的变化、储层平面分布的非均质性,补钻开发井物性变化;初期对气藏地质开发特征认识不足及测井解释方法不当,使气藏储量偏大;气井出水影响了气藏正常产能、采收率及气藏平衡开采等均是影响气藏开采达不到预期开发效果的主要因素。
Since 1997 when the Carboniferous gas reservoir of Longtou-Diaozhongba area in Dachiganjing structure belt was normally put into production, the productivity of the gas reservoir declines rapidly as the gas reservoir is exploited. The development results expected in the development design can't be reached, and the economic benefit of the gas reservoir development is dropped down. To slow the declining rate, prolong the gas recovery cycle, and improve the economic benefit of development for the gas reservoir, with analysis on the geological and productive features of the gas reservoir as well as deep study on the main reasons to influence development results of the gas reservoir, it is found that the main factors to influence development results of the gas reservoir include the variation of reservoir structure, the heterogeneity of reservoir areal distribution and the variation of physical property of the filling development wells. The reserves of the gas reservoir were estimated a little big because the geological and productive features of the gas reservoir were understood insufficiently and the methods of logging interpretation were improper at the early stage. Meanwhile the water producing in gas wells influenced the normal productivity, recovery factor and balance exploitation of the gas reservoir, etc.
Since 1997 when the Carboniferous gas reservoir of Longtou-Diaozhongba area in Dachiganjing structure belt was normally put into production, the productivity of the gas reservoir declines rapidly as the gas reservoir is exploited. The development results expected in the development design can't be reached, and the economic benefit of the gas reservoir development is dropped down. To slow the declining rate, prolong the gas recovery cycle, and improve the economic benefit of development for the gas reservoir, with analysis on the geological and productive features of the gas reservoir as well as deep study on the main reasons to influence development results of the gas reservoir, it is found that the main factors to influence development results of the gas reservoir include the variation of reservoir structure, the heterogeneity of reservoir areal distribution and the variation of physical property of the filling development wells. The reserves of the gas reservoir were estimated a little big because the geological and productive features of the gas reservoir were understood insufficiently and the methods of logging interpretation were improper at the early stage. Meanwhile the water producing in gas wells influenced the normal productivity, recovery factor and balance exploitation of the gas reservoir, etc.
引文
1王阳.大池干井构造带龙头—吊中坝石炭系气藏储量复核报告.中油西南油气田公司勘探开发研究院科研成果报告.2002
2贺伟.大池干井构造带龙—吊中坝石炭系气藏开发调整方案.四川石油管理局地质勘探开发研究院科研成果报告.1998
3张延充.川东大池干井构造带龙头—吊中坝高点地震老资料重新处理解释.四川石油管理局地质调查处科研成果报告.2002
2贺伟.大池干井构造带龙—吊中坝石炭系气藏开发调整方案.四川石油管理局地质勘探开发研究院科研成果报告.1998
3张延充.川东大池干井构造带龙头—吊中坝高点地震老资料重新处理解释.四川石油管理局地质调查处科研成果报告.2002
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心