惠民凹陷大芦家地区古近系沙河街组储集层特征及影响因素
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摘要
通过岩芯观察、岩石薄片、扫描电镜、物怔分析等技术手段,研究了大芦家地区古近系沙河街组储集层特征及影响因素。研究结果表明,三角洲相是本区所研究目的层段中最常见的相类型,以三角洲水下平原亚相和三角洲前缘亚相为主。沙二段-沙一段时期碎屑岩储集层岩性以粉、细砂岩为主,碎屑组分成分成熟度、结构成熟度均较低。主要储集空间类型为原生和次生粒间孔;孔隙形状以三角形或多边形为主,具有较粗的歪度和较好的分选性;同时具有随着埋藏深度增加储集物性变差的趋势。影响该区储层物性的因素主要有沉积相、成岩作用以及构造因素,其中砂体发育较厚的河口砂坝和河道砂坝微相是良好的油气储集体。
According to the cores, thin-section, scanning electric scope and physical features, the micro reservoir characteristics and influence factors of Shahejie Formation of Palaeogene in Dalujia area are analyzed. Study results show that delta is the most common sedimentary face in this area and underwater delta plain and front are dominant. From Es2 to Es1 the reservoir beds are mainly of fine-silt sandstones while the grade of maturity of rock structure and ingredient is low. The main types of reservoir spaces are primary and secondary intergranular pores. The pore shapes are most trigon or polygon with heavy crooked degree and moderate rock difference.The reservoir property shows a trend of reducing while burial depth increases. It is controlled by sedimentary environment,diagenesis and tectonic movement. Micro-facies with thick sand body such as channel sand bar and debouch bar are high-quality reservoir.
According to the cores, thin-section, scanning electric scope and physical features, the micro reservoir characteristics and influence factors of Shahejie Formation of Palaeogene in Dalujia area are analyzed. Study results show that delta is the most common sedimentary face in this area and underwater delta plain and front are dominant. From Es2 to Es1 the reservoir beds are mainly of fine-silt sandstones while the grade of maturity of rock structure and ingredient is low. The main types of reservoir spaces are primary and secondary intergranular pores. The pore shapes are most trigon or polygon with heavy crooked degree and moderate rock difference.The reservoir property shows a trend of reducing while burial depth increases. It is controlled by sedimentary environment,diagenesis and tectonic movement. Micro-facies with thick sand body such as channel sand bar and debouch bar are high-quality reservoir.
引文
[1]刘孟慧、赵微林,碎屑岩成岩演化模式[M],东营:石油大学出版社,1993.
[2]冯增昭、刘涣杰、刘涣杰,中国沉积学[M],北京:石油工业出版社,1994.
[3]Schmidt等,砂岩成岩过程中的次生储集孔隙[M],北京:石油工业出版社,1983.
[4]杜贤樾、孙焕泉、郑和荣,胜利油区勘探开发论文集[M],北京:地质出版社,1997.
[5]张莉、钟大康、朱筱敏,惠民凹陷古近系碎屑岩储层性质主控因素简析,中国地质,2005,32(4):682-689.
[6]郭兴伟、施小斌、丘学林等,渤海湾盆地新生代沉降特征及其动力学机制探讨,大地构造与成矿学,2007,31(3):273-280.
[7]国庆鹏、金振奎、曹志军,济阳坳陷大芦家区块薄储集层预测研究,石油勘探与开发,2005,32(5):82-85.
[8]李凌、林会喜、范振峰等,车镇北带古近系砂砾岩体储层特征及影响因素分析[J],石油天然气学报,2008,30(2):410-413.
[9]高勇、张连雪,板桥一北大港地区深层碎屑岩储集层特征及影响因素研究,石油勘探与开发,2001,28(2):36-39.
[10]张建贵、肖景华,黄骅坳陷千米桥潜山碳酸盐岩储层的空隙特征研究,大地构造与成矿学,2001,25(1):102-107.
[2]冯增昭、刘涣杰、刘涣杰,中国沉积学[M],北京:石油工业出版社,1994.
[3]Schmidt等,砂岩成岩过程中的次生储集孔隙[M],北京:石油工业出版社,1983.
[4]杜贤樾、孙焕泉、郑和荣,胜利油区勘探开发论文集[M],北京:地质出版社,1997.
[5]张莉、钟大康、朱筱敏,惠民凹陷古近系碎屑岩储层性质主控因素简析,中国地质,2005,32(4):682-689.
[6]郭兴伟、施小斌、丘学林等,渤海湾盆地新生代沉降特征及其动力学机制探讨,大地构造与成矿学,2007,31(3):273-280.
[7]国庆鹏、金振奎、曹志军,济阳坳陷大芦家区块薄储集层预测研究,石油勘探与开发,2005,32(5):82-85.
[8]李凌、林会喜、范振峰等,车镇北带古近系砂砾岩体储层特征及影响因素分析[J],石油天然气学报,2008,30(2):410-413.
[9]高勇、张连雪,板桥一北大港地区深层碎屑岩储集层特征及影响因素研究,石油勘探与开发,2001,28(2):36-39.
[10]张建贵、肖景华,黄骅坳陷千米桥潜山碳酸盐岩储层的空隙特征研究,大地构造与成矿学,2001,25(1):102-107.