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Received：14 October 2019，
Published：2020-04
移动端阅览
墨西哥EBANO油田地质特征复杂、油气分布预测难度大，油田开发效果差。利用岩心、测井、地震、生产动态等多方面数据，对油藏特征及油气主控因素开展系统研究。研究表明，上白垩统K
sf
和K
an
两组灰岩地层是EBANO油田的主力层；断裂系统受区域构造运动影响，南北差异大，北部断裂级别小、断距小、切割层位少、延伸距离短，南部断裂级别大、断距大、切割层位多、延伸距离长；储集空间主要为基质孔隙和裂缝，基质含油非均质性强，断裂附近含油性较好；EBANO油田油气富集主要受断层、构造、裂缝和基质有效厚度控制。基于新认识，实现井位部署由北部高构造向南部低构造的战略转移，平均初产是前期井的2.1倍，开发效果明显改善，为油田高效开发
奠定了基础。
The geology feature of EBANO oilfield in Mexico is complex
leading to difficulty in predicting hydrocarbon distribution
and poor development results.Based on the core description
well logging and seismic data
and well production performance data
we studied the reservoir characteristics and the main factors controlling hydrocarbon accumulation in a systematic way.The results show that the limestone KSF and Kan strata of the Upper Cretaceous are the major pay zones of EBANO oilfield.Due to regional tectonic movement
the fault system shows large difference between the northern and southern parts
with of smaller rank in the north:shorter fault displacement
fewer horizons getting incised and shorter extension distance in the north
and larger rank ones to the south.The reservoir space is dominated by both matrix pores and fractures:the oil-bearing matrix is strong in heterogeneity
and the oil content surrounding faults is high.The hydrocarbon enrichment in EBANO oilfield is controlled mainly by fault
structure
fracture and effective thickness of matrix.Given the above-mentioned new understandings
we implemented a strategic transfer of well emplacement from the higher structures in the north to the lower structures in the south.The development results is obviously improved with the average initial production of new wells 2.1 times that of the old ones
laying a foundation for the successful development of the oilfield.
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