摘要
利用Yielding断层侧向封闭性评价方法预测油柱高度过程中,发现断层侧向封闭油气能力与油气分布呈现部分不吻合现象,经过深入研究表明:是由于未考虑断层侧向封闭油气下限以及封闭区域造成的。当断面上某一深度范围内最小断层泥化率(SGR值)大于断层侧向封闭油气下限时,整条断层在该深度范围内对油气具有侧向封闭能力,Yielding断层侧向评价方法可直接应用,其预测结果与油气吻合度较好;而当断面上某一深度范围内最小SGR值小于断层侧向封闭油气下限时,该点在封闭区域之外,按照Yielding预测方法可能会低估或高估断层的侧向封闭能力。为了更准确研究断层侧向封闭性评价方法,因此针对这种情况对断层侧向封闭评价方法进行了改进,并选取冀中坳陷文安斜坡断层型圈闭为例,利用改进后的断层侧向评价方法对断圈侧向封闭能力进行定量评价,结果表明:沙一段1~2号断圈的预测结果与井含油气性相吻合,表明该方法用于定量评价断层侧向封闭性是可行的,更正了Yielding评价方法低估或高估封闭断圈侧向封闭油气的能力,提高了断层侧向封闭能力预测的准确度。
Yielding, a fault lateral sealing evaluation method is often used to predict the height of oil column. But the predicted results were found to partially disaccord with the distribution of oil and gas. In-depth study shows that this phenomenon may be attributed to failing to consider the lower limit and seal area of fault lateral sealing. When the minimum SGR at a certain depth range of fault plane is greater than the lower limit of fault lateral sealing, the whole fault is of lateral sealing ability at this depth range. Yielding method can be directly applied in the fault lateral evaluation and prediction results are well coupled with oil and gas distribution. However, when the minimum SGR at a certain depth range of fault plane is less than the lower limit of fault lateral sealing hydrocarbon, the lateral seal ability of faults at this point outside the sealed area may be underestimated or overestimated using Yielding method. In order to predict hydrocarbon column height more accurately, this study focused on improving fault lateral sealing evaluation method of Yielding. With Wenan slope faulting-type trap in the Jizhong Depression as an example, fault trap lateral sealing ability was quantitatively evaluated by the improved method. The results show that prediction results of Sha No. 1 and No. 2 traps are in conformity with oil and gas distribution, indicating that the Yielding method is feasible for quantitative evaluation of lateral sealing of a fault. This revises shortcoming of underestimation or overestimation to sealing trap capability using Yielding methodology, thus improving accuracy degree of predicting lateral sealing ability.
作者
王超
付广
董英洁
杨德相
曹兰柱
胡欣蕾
WANG Chao FU Guang DONG Yingjie YANG Dexiang CAO Lanzhu HU Xinlei(） Northeast Petroleum University, Daqing , Heilongj iang , 163318 ） The First Oil Production Plant of Daqing Oil Field Co, Daqing, Heilongjiang, 163001 Exploration and Development Research Institute of PetroChina Huabei Oil field Company, Renqiu, Hebei, 06255)
出处
《地质学报》
EI
CAS
CSCD
北大核心
2017年第7期1641-1650,共10页
Acta Geologica Sinica
基金
国家自然科学基金项目(编号41372154
41602154)
中国石油科技创新基金(编号2015D-5006-0103)
东北石油大学研究生创新科研项目(编号YHSCX2015-002NEPU)共同资助成果
关键词
断层侧向封闭性
评价方法改进
封闭油气柱高度
定量分析
fault sealing
evaluation method of improvement
sealing hydrocarbon column height
quantitative analysis
