苏5、桃7区块井位优选技术探讨
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摘要
针对苏里格这种低孔、低渗、低压、低丰度、薄互层、砂体变化大的气藏所具有的地震多解性强的特点,采用单一方法选井,其成功率不会太高,而组合方法优选井位则成效更加明显。通过反复摸索,形成了"以优势波形结构精细分析、小波变换、反演技术及优化属性分析"为主的井位优选模式,在实践中取得了极佳的效果,Ⅰ+Ⅱ类井成功率由招标前的25%激增到91%,快速实现了苏里格地区的规模有效开发。
Sulige gas field is known to have reservoirs featured by low porosity, low permeability, low pressure, low abundance, thin interlayered, and great differences among sand bodies, which brings out great difficulty to seismic interpretation. Exploration wells could not successfully preferred easily by single one method but if composite methods are adopted obvious results will be obtained After collecting from many experiences and lessons from exploration works there, this paper put forward a safe mode of optimizing well sites, i.e., composite methods including fine analysis by advantageous wave structure, small wave transformation, inversion, and optimized factors studies, which has been proved to be successful in actual uses on fields. The success ratio of wells typeⅠ+Ⅱ have been increased sharply from 25% to 91%, which shows great potential for high-efficiently development of Sulige gas field.
Sulige gas field is known to have reservoirs featured by low porosity, low permeability, low pressure, low abundance, thin interlayered, and great differences among sand bodies, which brings out great difficulty to seismic interpretation. Exploration wells could not successfully preferred easily by single one method but if composite methods are adopted obvious results will be obtained After collecting from many experiences and lessons from exploration works there, this paper put forward a safe mode of optimizing well sites, i.e., composite methods including fine analysis by advantageous wave structure, small wave transformation, inversion, and optimized factors studies, which has been proved to be successful in actual uses on fields. The success ratio of wells typeⅠ+Ⅱ have been increased sharply from 25% to 91%, which shows great potential for high-efficiently development of Sulige gas field.
引文
[1]费怀义,朱心万,高俊华.苏5、桃7区块勘探开发综合配套技术[J].天然气工业,2007,27(增刊B):66-71.
[2]胡文瑞.岩性地层油气藏勘探理论与实践[M].北京:石油工业出版社,2005.
[3]于忠平,贾亚妮,姬红,等.鄂尔多斯盆地东部上古生界碎屑岩储层特征[J].天然气工业,2002,22(6):27-30.
[4]卢文东,李伟,路云峰.榆林—神木气田上古生界具不同产能的砂岩气层特征分析[J].天然气工业,2006,26(7):54-56.
[2]胡文瑞.岩性地层油气藏勘探理论与实践[M].北京:石油工业出版社,2005.
[3]于忠平,贾亚妮,姬红,等.鄂尔多斯盆地东部上古生界碎屑岩储层特征[J].天然气工业,2002,22(6):27-30.
[4]卢文东,李伟,路云峰.榆林—神木气田上古生界具不同产能的砂岩气层特征分析[J].天然气工业,2006,26(7):54-56.
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