威远—安岳地区下二叠统古地貌恢复及其油气富集关系研究
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摘要
威远—安岳地区下二叠统碳酸盐岩岩性致密,生产资料显示气藏储层段与岩溶、裂缝密切相关,古地形地貌是控制古岩溶发育与分布的主要因素,恢复该地区古地貌并研究古地貌与油气富集关系有助于指导下一步油气勘探。在研究古地貌恢复方法的基础上,分析钻井、测井、地震资料及区域构造史,最终选用印模法恢复出了该地区下二叠统古地貌。研究表明,古岩溶残丘和古岩溶陡坡是勘探的有利区域,古沟槽亦是勘探中应重点兼顾的区域,古岩溶缓坡和古岩溶台地是勘探不太理想的区域。
The lithologic characteristic of the carbonate rock in Lower Permian in the district from Weiyuan to Anyue is tight.It can be found from the means of production,the container horizon of this gas reservoir is close link to karst and fissure.The palaeogeomorphology is a primary factor that control the development and distribution of palaeokarst.Researching the relationship between the palaeogeomorphology feature and oil-gas is conductive to guide the explore of oil-gas.This gas analyzes the data of well drilling,well logging,seismic and areal structure to recover the palaeogeomorphology of the Lower Permian from Weiyuan to Anyue district on the base of mould theory.The residual hill and the abrupt slope are the favorable region of exploring.The paleokarstic gaw should be stressly considered.The tableland and the gentle slope are the unfavorable region of exploring.
The lithologic characteristic of the carbonate rock in Lower Permian in the district from Weiyuan to Anyue is tight.It can be found from the means of production,the container horizon of this gas reservoir is close link to karst and fissure.The palaeogeomorphology is a primary factor that control the development and distribution of palaeokarst.Researching the relationship between the palaeogeomorphology feature and oil-gas is conductive to guide the explore of oil-gas.This gas analyzes the data of well drilling,well logging,seismic and areal structure to recover the palaeogeomorphology of the Lower Permian from Weiyuan to Anyue district on the base of mould theory.The residual hill and the abrupt slope are the favorable region of exploring.The paleokarstic gaw should be stressly considered.The tableland and the gentle slope are the unfavorable region of exploring.
引文
[1]李伟.恢复地层剥蚀厚度方法综述[J].中国海上油气(地质),1996,10(3):169-171.
[2]王敏芳,焦养泉,黄传炎.地层剥蚀量恢复方法浅述[J].承德石油高等专科学校学报,2005,7(4):6-11.
[3]加东辉,徐长贵,杨波,等.辽东湾辽东带中南部古近纪古地貌恢复和演化及其对沉积体系的控制[J].古地貌学报,2007,9(2):155-166.
[4]赵俊兴,陈洪德,时志强.古地貌恢复技术方法及其研究意义[J].成都理工学院学报,2001,28(3):260-266.
[2]王敏芳,焦养泉,黄传炎.地层剥蚀量恢复方法浅述[J].承德石油高等专科学校学报,2005,7(4):6-11.
[3]加东辉,徐长贵,杨波,等.辽东湾辽东带中南部古近纪古地貌恢复和演化及其对沉积体系的控制[J].古地貌学报,2007,9(2):155-166.
[4]赵俊兴,陈洪德,时志强.古地貌恢复技术方法及其研究意义[J].成都理工学院学报,2001,28(3):260-266.
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