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火成岩岩性识别与物性测井评价 ——以准噶尔盆地东部石炭系火成岩为例
Logging lithological identification and petrophysical property evaluation of igneous rocks: Examples from Carboniferous igneous rocks, eastern Junggar Basin
黄 力1 王安生2 王跃祥1 王秀彦2 赵艾琳1 杨 满3 张宗富3
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作者单位:1. 中国石油西南油气田分公司勘探开发研究院 2. 中国石油东方地球物理公司研究院 3. 斯伦贝谢有限公司
中文关键字:石炭系 火成岩 三维岩性识别图版 分岩性解释模型 裂缝评价
英文关键字:Carboniferous; Igneous rock;3D lithological identification chart; Lithology interpretation model; Fracture evaluation
中文摘要:近年,不断发现新的火成岩油气藏,其勘探潜力巨大。但是火成岩岩性复杂,储层多为溶蚀孔洞—裂缝双重孔隙介
质的强烈非均质储层,其岩性测井识别与储层测井评价都非常困难。为此,以准噶尔盆地东部石炭系火成岩为例:①针对岩性复
杂多样,岩性识别敏感参数不清的问题,利用主成分分析方法确定该区块的火成岩岩性敏感曲线为密度、电阻率和自然伽马,并
在此基础上建立了三维岩性识别图版;②针对物性解释精度低,基质孔隙度计算采用岩心刻度测井曲线的方法,分岩性建立了物
性解释模型;③采用建立成像测井与双侧向测井相关性的方法来表征裂缝孔隙度。结果表明:①三维岩性图版比二维图版增加1
个参数,更适合复杂的火成岩岩性解释;②经过岩心刻度分不同岩性建模计算的基质孔隙度符合储量计算的精度要求;③裂缝孔
隙度的计算结果表明裂缝发育与岩性有着密切关系,储层主要发育在裂缝孔隙度较高的角砾凝灰岩和火山角砾岩中,安山岩岩性
致密,但裂缝较发育,可作为潜力储层。

英文摘要:In recent years, new igneous-rock oil and gas reservoirs have been discovered one after another, bringing about a huge exploration
potential. However, these igneous rocks are lithologically complex and igneous-rock reservoirs are mostly of strong heterogeneity
with double-porosity media of dissolved vug and fracture. So their logging lithological identification and reservoir evaluation
are quite difficult. Taking the Carboniferous igneous rocks in eastern Junggar Basin as examples, we did following studies. Firstly, in
order to solve some problems of lithological complexity and diversity, and unclear determining sensitivity parameters through lithology,
a 3D lithological identification chart was established on the basis of principal component analysis method which was used to determine
that lithology sensitive curves of igneous rocks in this block should be density, resistivity and gamma-ray curves. Secondly, considering
low accuracy of physical-property interpretation, one method of core-calibrated logging curve was adopted to calculate matrix
porosity, and one model of physical-property interpretation was established corresponding to each lithology. At last, fracture porosity
was characterized by establishing the correlation between imaging logging and dual lateral logging. Results show that (1) compared
with 2D chart, this 3D lithological identification chart has one more parameter and it is more suitable for lithologic interpretation of
complex igneous rocks; (2) the matrix porosity calculated by core-calibrated model meets the requirement of reserve calculation precision;
and (3) the calculated fracture porosity shows a close relationship between fracture development and lithology. Most reservoirs
are mainly developed in breccia tuff and volcanic breccia with higher fracture porosity. And andesite with tight lithology and more developed
fractures should be potential reservoirs.
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国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
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