库车坳陷大北—克拉苏深层构造带有效储层埋深下限预测

doi:10.7623/syxb201102004

石油学报 ›› 2011, Vol. 32 ›› Issue (2): 212-218.DOI: 10.7623/syxb201102004

库车坳陷大北—克拉苏深层构造带有效储层埋深下限预测

王波 1 张荣虎 1 任康绪 2 罗鹏 3 刘春 1

1中国石油杭州地质研究院浙江杭州 310023； 2中国石油塔里木油田公司勘探开发研究院新疆库尔勒 841000； 3中海油能源发展监督监理技术公司天津 300452

收稿日期:2010-05-26 修回日期:2010-09-29 出版日期:2011-03-25 发布日期:2011-05-25
通讯作者: 王波
作者简介:王男，1983年1月生，2009年获中国石油勘探开发研究院硕士学位，现为中国石油杭州地质研究院工程师，主要从事储层地质学研究。
基金资助:
国家自然科学基金项目（No.40472069）和中国石油天然气集团公司科技创新基金项目(2008D-006-01-03)联合资助。

Prediction of the lower limit of burial depth for effective reservoirs in the Dabei-Kelasu deep structural belt of Kuqa Depression

WANG Bo 1 ZHANG Ronghu 1 REN Kangxu 2 LUO Peng 3 LIU Chun 1

Received:2010-05-26 Revised:2010-09-29 Online:2011-03-25 Published:2011-05-25

摘要/Abstract

摘要：

白垩系巴什基奇克组是库车坳陷大北—克拉苏深层构造带一套优质储层和主要产层，其埋深大于5000m，岩心资料缺乏，有效储层分布预测难度大。应用模型预测法、测井孔隙度包络线法、有效储层占砂岩厚度百分比法和盆模正演法4种方法，对大北—克拉苏深层构造带有效储层的埋深下限进行了预测。由于方法本身和资料品质的差异性，在不同构造区带不同方法预测的相对可靠程度以及结果有差异。采用储层评价中常用的“权重”评价法，根据各种方法的可靠程度，给予不同的权重系数，对大北—克拉苏深层构造带综合评价表明，其有效储层埋深下限约为8000~8300 m，其中大北区带约为8200 m，克深区带约为8300 m，克深北区带和克深南区带约为8100 m，拜城北区带约为8000 m。有效储层占砂岩厚度百分比是深部储层评价的重要参数，大北—克拉苏深层构造带巴什基奇克组储层埋深与有效储层占砂岩厚度百分比呈三次幂关系，可以利用储集层的埋深范围，反过来求其有效储层厚度。

关键词: 有效储层, 埋深下限, 巴什基奇克组, 白垩系, 大北—克拉苏深层构造带, 库车坳陷

Abstract:

The Cretaceous Bashijiqike Formation is one of the high-quality sandstone reservoirs and a primary oil/gas-producing bed in the Kuqa Depression of Tarim Basin. As its burial depth is more than 5000m and cores are limited, the prediction of effective reservoirs in the Dabei-Kelasu deep structural belt is considerably difficult. Four methods, including the model-based prediction, envelop curves of porosity from logging data, the ration of effective reservoirs to sandstones and the forward modeling for Basin Modeling Software，have been used to predict the lower limit of buried depths of researched area. Due to the diversity of methods themselves and the data qualities, differences in methodological reliability and veracity by different methods existed in different structure areas. The “weighting” hypothetical valuation method that be common used in reservoirs valuation, by giving different weight coefficients based on the reliability of various methods, has also been used. Finally the lower limit of burial depth of effective reservoirs in the Dabei-Kelasu deep structural areas was predicted to be about 8000-8300 m, that Dabei area was about 8200 m, Keshen area was about 8300 m, the north and south of Keshen area were about 8100 m, the northern of Baicheng area was about 8000 m. The ratio of effective reservoirs to sandstones is an important parameter for the evaluation of deeply-buried reservoirs, the burial depth of deep reservoirs and the ratio of effective reservoirs to sandstones of the Bashijiqike Formation in the Dabei-Kelasu deep structural belt had a third power relationship, by which the burial range of reservoirs could be used to inversely predict the thickness of effective reservoirs.

Key words: effective reservoir, lower limit of burial depth, Bashijiqike Formation, Cretaceous, Dabei-Kelasu deep structural belt, Kuqa Depression

王波张荣虎任康绪罗鹏刘春. 库车坳陷大北—克拉苏深层构造带有效储层埋深下限预测[J]. 石油学报, 2011, 32(2): 212-218.

WANG Bo ZHANG Ronghu REN Kangxu LUO Peng LIU Chun. Prediction of the lower limit of burial depth for effective reservoirs in the Dabei-Kelasu deep structural belt of Kuqa Depression[J]. Editorial office of ACTA PETROLEI SINICA, 2011, 32(2): 212-218.

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库车坳陷大北—克拉苏深层构造带有效储层埋深下限预测

Prediction of the lower limit of burial depth for effective reservoirs in the Dabei-Kelasu deep structural belt of Kuqa Depression

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