溱潼凹陷西部戴一段近岸水下扇砂体分布特征及勘探潜力
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摘要
以地震、钻井、岩心及测井资料为基础,综合岩相、粒度、矿物成熟度、地震相分析,明确了泰州凸起是溱潼凹陷戴一段的主要物源供给区,戴一段具有形成环凹扇体的物源、地形及动力条件。依托岩相、地震相分析及储层波阻抗反演结果,首次明确了溱潼凹陷西部环凹带发育2个近岸水下扇。西部环凹带勘探程度低,剩余资源量较大,戴一段环凹扇体的发现不仅改变了以往西部储层不发育的认识,而且明确了陡坡带、深凹带及内坡带三个有利勘探区带及构造–岩性、岩性油藏两种类型的勘探目标,指明了下一步勘探方向。
Based on seismic, drilling, core and well logging data, through comprehensive analysis of lithofacies,particle sizes, mineral maturity and seismic facies, Taizhou uplift was made clear to be the main provenance orientation of the first member of Dainan formation in Qintong sag and the first member of Dainan formation is provided with the material source, topography and dynamic conditions for forming a ring concave fan body.Combined with the lithofacies, seismic facies analysis and reservoir wave impedance inversion, two nearshore subaqueous fans were developed in the area around western Qingtong sag. The exploration degree of the area around western Qingtong sag is low and the remaining resources is large. The discovery of the ring concave fan body in the first member of Dainan formation not only changes the previous understanding of undeveloped reservoir in the west, but also makes clear three favorable exploration zones, namely steep slope zone, deep concave zone and inner slope zone. Besides that, the exploration targets, the structure-lithology and lithology reservoirs are also made clear, which points out the exploration direction in the next step.
Based on seismic, drilling, core and well logging data, through comprehensive analysis of lithofacies,particle sizes, mineral maturity and seismic facies, Taizhou uplift was made clear to be the main provenance orientation of the first member of Dainan formation in Qintong sag and the first member of Dainan formation is provided with the material source, topography and dynamic conditions for forming a ring concave fan body.Combined with the lithofacies, seismic facies analysis and reservoir wave impedance inversion, two nearshore subaqueous fans were developed in the area around western Qingtong sag. The exploration degree of the area around western Qingtong sag is low and the remaining resources is large. The discovery of the ring concave fan body in the first member of Dainan formation not only changes the previous understanding of undeveloped reservoir in the west, but also makes clear three favorable exploration zones, namely steep slope zone, deep concave zone and inner slope zone. Besides that, the exploration targets, the structure-lithology and lithology reservoirs are also made clear, which points out the exploration direction in the next step.
引文
[1]隋风贵.断陷湖盆陡坡带砂砾岩扇体成藏动力学特征[J].石油与天然气地质,2003,24(4):335–340.
[2]隋风贵.东营凹陷北带东部古近系近岸水下扇储集物性演化及其油气成藏模式[J].地质学报,2010,84(2):246–256.
[3]张喜林,朱筱敏,钟大康,等.苏北盆地高邮凹陷古近系戴南组沉积相及其对隐蔽油气藏的控制[J].古地理学报,2005,7(2):207–218.
[4]臧素华,花彩霞.金湖凹陷金南—腰滩地区戴南组一段高分辨率层序构型及砂体展布特征[J].高校地质学报,2013,19(3):536–543.
[5]吴伟,臧素华,郭春雷,等.金湖凹陷三河深凹带近岸水下扇的发现及其地质意义[J].油气藏评价与开发,2014,5(3):7–11.
[6]刘丽军,佟彦明,纪云龙,等.北部湾盆地福山凹陷流沙港组湖底扇沉积特正及发育背景[J].石油实验地质,2003,25(2):110–115.
[7]臧素华.苏北盆地溱潼凹陷西斜坡阜三段沉积相研究[J].石油地质与工程,2014,28(6):22–24.
[8]刘伟.苏北溱潼凹陷戴南组一段次生孔隙形成与分布特征[J].岩相古地理,1997,17(2):24–31.
[9]阎丽妮.苏北溱潼凹陷草舍转换带扇三角洲沉积特征研究[J].科技创新导报,2009,17(2):128–135.
[10]陆黄生,杨永才,刘军,等.苏北盆地溱潼凹陷断阶带油气藏的成藏期次[J].地质通报,2008,27(5):634–640.
[11]施泽进,张渝昌,施央申,等.苏北溱潼凹陷形成演化的运动学模拟[J].石油实验地质,1994,16(4):325–333.
[2]隋风贵.东营凹陷北带东部古近系近岸水下扇储集物性演化及其油气成藏模式[J].地质学报,2010,84(2):246–256.
[3]张喜林,朱筱敏,钟大康,等.苏北盆地高邮凹陷古近系戴南组沉积相及其对隐蔽油气藏的控制[J].古地理学报,2005,7(2):207–218.
[4]臧素华,花彩霞.金湖凹陷金南—腰滩地区戴南组一段高分辨率层序构型及砂体展布特征[J].高校地质学报,2013,19(3):536–543.
[5]吴伟,臧素华,郭春雷,等.金湖凹陷三河深凹带近岸水下扇的发现及其地质意义[J].油气藏评价与开发,2014,5(3):7–11.
[6]刘丽军,佟彦明,纪云龙,等.北部湾盆地福山凹陷流沙港组湖底扇沉积特正及发育背景[J].石油实验地质,2003,25(2):110–115.
[7]臧素华.苏北盆地溱潼凹陷西斜坡阜三段沉积相研究[J].石油地质与工程,2014,28(6):22–24.
[8]刘伟.苏北溱潼凹陷戴南组一段次生孔隙形成与分布特征[J].岩相古地理,1997,17(2):24–31.
[9]阎丽妮.苏北溱潼凹陷草舍转换带扇三角洲沉积特征研究[J].科技创新导报,2009,17(2):128–135.
[10]陆黄生,杨永才,刘军,等.苏北盆地溱潼凹陷断阶带油气藏的成藏期次[J].地质通报,2008,27(5):634–640.
[11]施泽进,张渝昌,施央申,等.苏北溱潼凹陷形成演化的运动学模拟[J].石油实验地质,1994,16(4):325–333.