塔里木盆地HD23井区中奥陶统生物礁滩体的识别与研究
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摘要
礁滩体储层是中国目前碳酸盐岩勘探的重点。塔里木盆地奥陶系礁滩复合储集体发育,中奥陶统生物礁发育层位主要在一间房组,发育区集中分布在塔北、巴楚等地,并以开阔台地台内点礁方式出现。HD23井区内共有奥陶系探井4口,其中HD17井、HD13井、YW2井在中奥陶统一间房组都钻遇了托盘类瓶筐石(Calathium)障积礁,礁的厚度约5m,礁的上下地层均为砂屑鲕粒灰岩和砂砾屑灰岩等滩相沉积,形成礁滩复合体。文中通过钻井资料和地球物理资料,深入研究了HD23井区礁滩体的特征与分布。三维地震解释显示一间房组地层中存在一个厚度异常体,经分析认为该异常体就是局部异常发育的瓶筐石生物礁滩复合体,该生物礁滩体横向连片,有一定的分布范围和规模。对该井区内中奥陶统一间房组的生物礁滩体加以研究,将为下一步奥陶系的油气勘探提供依据。
Middle Ordovician organic reefs in Tarim Basin mainly develop in Yijianfang Formation and are chiefly distributed in Tabei and Bachu areas with patch reef in open platform development.There are four Ordovician exploration wells at Wellblock HD23,in which HD17,HD13 and YW2 are found Calathium reefs in drilling,the thickness of the reef is about five meters,the upper and lower strata of the reefs is composed by arene oolitic limestone and gritty limestone.The explanation of 3D seismics at Wellblock HD23 exhibit that there are a thickness anomalous body in the strata of Yijianfang Formation,by analyzing,the anomalous body is the locally anomalous development of calathium reef-banks complex.The reef-banks complex is lateral sectors-connecting and has certain distribution scope and scale.The research of reef-banks complex of Middle Ordovician Yijianfang Formation at the wellblock will provide reference for the next step of Ordovician exploration activity.
Middle Ordovician organic reefs in Tarim Basin mainly develop in Yijianfang Formation and are chiefly distributed in Tabei and Bachu areas with patch reef in open platform development.There are four Ordovician exploration wells at Wellblock HD23,in which HD17,HD13 and YW2 are found Calathium reefs in drilling,the thickness of the reef is about five meters,the upper and lower strata of the reefs is composed by arene oolitic limestone and gritty limestone.The explanation of 3D seismics at Wellblock HD23 exhibit that there are a thickness anomalous body in the strata of Yijianfang Formation,by analyzing,the anomalous body is the locally anomalous development of calathium reef-banks complex.The reef-banks complex is lateral sectors-connecting and has certain distribution scope and scale.The research of reef-banks complex of Middle Ordovician Yijianfang Formation at the wellblock will provide reference for the next step of Ordovician exploration activity.
引文
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[18]李越,王建坡,沈安江,等.新疆巴楚中奥陶统上部一间房组瓶筐石礁丘的演化意义[J].古生物学报,2007,46(3):347-354.
[19]顾家裕,方辉,蒋凌志.塔里木盆地奥陶系生物礁的发现及其意义[J].石油勘探与开发,2001,28(4):1-3.
[20]舒志国,何希鹏,邓世新.塔里木盆地塔中隆起南坡上奥陶统礁滩相带的发现及油气勘探意义[J].海洋地质与第四纪地质,2007,27(6):77-82.
[21]邬光辉,黄广建,王振宇,等.塔中奥陶系生物礁地震识别与预测[J].天然气工业,2007,27(4):40-42.
[22]徐国强,邵大力,刘树根,等.塔北隆起区一间房组礁滩沉积体特征[J].天然气工业,2006,26(8):16-19.
[2]Zhao W Z,Zhu G Y,Zhang S C,et al.Relationship betweenthe later strong gas-charging and the improvement of the res-ervoir capacity in deep Ordovician carbonate reservoir inTazhong area,Tarim Basin[J].Chinese Science Bulletin,2009,54(17):3076-3089.
[3]张水昌,梁狄刚,朱光有,等.中国海相油气形成的地质基础[J].科学通报,2007,52(增刊):19-31.
[4]马永生.四川盆地普光超大型气田的形成机制[J].石油学报,2007,28(2):9-14.
[5]朱光有,赵文智,梁英波.中国海相沉积盆地富气机理与天然气的成因探讨[J].科学通报,2007,52(增刊):46-57.
[6]赵雪凤,朱光有,刘钦甫,等.深部海相碳酸盐岩储层孔隙发育主控因素研究[J].天然气地球科学,2007,8(4):514-521.
[7]黄思静,Qing H R,胡作维,等.四川盆地东北部三叠系飞仙关组硫酸盐还原作用对碳酸盐成岩作用的影响[J].沉积学报,2007,25(6):815-824.
[8]朱光有,张水昌,梁英波.TSR&H2S对深部碳酸盐岩储层的溶蚀改造作用:四川盆地深部碳酸盐岩优质储层形成的重要方式[J].岩石学报,2006,22(8):2182-2194.
[9]韩剑发,梅廉夫,杨海军,等.塔里木盆地塔中地区奥陶系碳酸盐岩礁滩复合体油气来源与运聚成藏研究[J].天然气地球科学,2007,18(3):426-435.
[10]张水昌,朱光有,梁英波.四川盆地普光大型气田H2S及优质储层形成机理探讨[J].地质论评,2006,52(2):230-235.
[11]周新源,王招明,杨海军,等.塔中奥陶系大型凝析气田的勘探和发现[J].海相油气地质,2006,11(1):45-51.
[12]朱光有,张水昌,梁英波,等.四川盆地深部海相优质储集层的形成机理及其分布预测[J].石油勘探与开发,2006,33(2):161-166.
[13]黄思静,Qing H R,裴昌蓉,等.川东三叠系飞仙关组白云岩锶含量和锶同位素组成与白云岩化流体[J].岩石学报,2006,22(8):2123-2132.
[14]张水昌,朱光有.四川盆地海相天然气富集成藏特征与勘探潜力[J].石油学报,2006,27(5):1-8.
[15]杨海军,刘胜,李宇平,等.塔中地区中-上奥陶统碳酸盐岩储集层特征分析[J].海相油气地质,2000,5(1/2):73-83.
[16]张宝民,刘静江,边立曾,等.礁滩体与建设性成岩作用[J].地学前缘,2009,16(1):270-287.
[17]王招明,张丽娟,王振宇,等.塔里木盆地奥陶系礁滩体特征与油气勘探[J].中国石油勘探,2007(6):1-7.
[18]李越,王建坡,沈安江,等.新疆巴楚中奥陶统上部一间房组瓶筐石礁丘的演化意义[J].古生物学报,2007,46(3):347-354.
[19]顾家裕,方辉,蒋凌志.塔里木盆地奥陶系生物礁的发现及其意义[J].石油勘探与开发,2001,28(4):1-3.
[20]舒志国,何希鹏,邓世新.塔里木盆地塔中隆起南坡上奥陶统礁滩相带的发现及油气勘探意义[J].海洋地质与第四纪地质,2007,27(6):77-82.
[21]邬光辉,黄广建,王振宇,等.塔中奥陶系生物礁地震识别与预测[J].天然气工业,2007,27(4):40-42.
[22]徐国强,邵大力,刘树根,等.塔北隆起区一间房组礁滩沉积体特征[J].天然气工业,2006,26(8):16-19.
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