河流三角洲沉积含钙储层厚度划分方法研究

Research on thickness delineation of calcium layer in
fluvial-dominated delta reservoir

 江怀友1 沈平平2 张建国3 朱达智4 李治平5 齐仁理6

Jiang Huaiyou ,Shen Pingping,Zhang Jianguo,et al

 渊1.中国石油经济技术研究院袁北京100011曰2. 中国石油勘探开发研究院袁北京100083曰3.中国石油国际勘探开发公司袁北京100083曰
4.中国石油集团科技评估中心袁北京100011曰5. 中国地质大学袁北京100083曰6.大庆石油学院袁黑龙江大庆163318冤

Research Institute of Economics and
Technology,CNPC, Beijing 100011, China

河流三角洲储层新测井系列,利用电性划分有效厚度、表外I 类、II 类厚度操作规程，对所
有高阻显示层都作为钙质层扣除，没有考虑是否有含油产状。通过对大庆油田萨中地区密闭取心井资料
分析，发现原被扣除的高阻夹层中，部分层具有含油产状。其中5.7%层可划有效厚度，8.5%层可划砂岩
厚度，5.1%层可划表外厚度。原钙质层中，平均单井含有砂岩厚度1.85 m、有效厚度1.6 m尧，表外厚度1.0
m，在原操作标准中被误划为高阻夹层或钙质层，厚度被漏划掉。因此重新认识含钙储层，准确划分含钙
储层厚度势在必行。从含钙储层识别入手，分别按照萨零及萨葡高油层的不同测井曲线响应特征，研究
该类储层的电性标准和储层厚度划分方法，最终准确识别含钙储层，划分钙质层厚度，为进一步挖潜提
供理论及实践依据。

In the operating instruction for thickness delineation of
effective layer, first class reservoir and second class reservoir in
fluvial -dominated delta reservoir are divided using well electric
logging. All resistive layers are deducted as calcium layers
regardless of oil occurrence. From pressure coring data analysis of
Sazhong block in Daqing Oilfield, it can be seen that some resistive
interbeds, originally deducted, have oil occurrence. Comparing with
coring well, 5.7% of whole thickness can be classified as effective
thickness, 8.5% as sandstone reservoir thickness, 5.1% as useless
reservoir thickness. Among layers originally classified as calcium
layers according to former operating instruction, about 1.85 m of
sandstone, 1.6 m of effective thickness, 1.0 m of useless reservoir in
a single well by average is classified by mistake. So identification of
calcium layer and thickness delineation are essential. In this paper,
identification of calcium layer is the first work. Researching on the
electric property criterion of calcium layer and the thickness
delineation method is the second one. At last, calcium layer and
delineating its thickness are identified.