成都理工大学学报（自然科学版）
成都理工大學學報（自然科學版）
성도리공대학학보（자연과학판）
JOURNAL OF CHENGDU UNIVERSITY OF TECHNOLOGY(SCIENCE & TECHNOLOGY EDITION)
2014年
5期
556-566
,共11页
花岗岩%表生喀斯特作用%风化壳%蓬莱油田
花崗巖%錶生喀斯特作用%風化殼%蓬萊油田
화강암%표생객사특작용%풍화각%봉래유전
granite%epigenic karstification%weathering crust%Penglai oil field
蓬莱9-1油田位于庙西北凸起，是罕见的大型中生界花岗岩油田，储层发育规律是制约勘探开发的关键问题。通过对岩体进行岩心、测井和化学测试资料综合分析，结果表明，花岗岩潜山风化壳在垂向上依次可划分出土壤层、砂化层、砂化砾石层、裂缝带和基岩；不同带中储集空间类型不同，砂化层以孔隙型储层为主，砂化砾石层以裂缝型＋孔隙型储层为主，裂缝带以裂缝型储层为主；从砂化层到裂缝带，储层的孔隙度逐渐降低，裂缝越来越发育，储层的渗透率从裂缝带到砂化层和基岩带依次降低；优质储层主要发育于砂化层、砂化砾石层和裂缝带中，储集空间类型主要为裂缝-孔洞型；储层的孔隙度主要受表生喀斯特作用（包括风化作用）控制，裂缝主要受变形强度和断裂的控制。砂化层、砂化砾石层的厚度受表生喀斯特作用控制，裂缝带的发育与构造作用密切相关。砂化砾石层和裂缝带以高的渗透率和最大的厚度而成为风化壳型潜山最为重要的储层。
蓬萊9-1油田位于廟西北凸起，是罕見的大型中生界花崗巖油田，儲層髮育規律是製約勘探開髮的關鍵問題。通過對巖體進行巖心、測井和化學測試資料綜閤分析，結果錶明，花崗巖潛山風化殼在垂嚮上依次可劃分齣土壤層、砂化層、砂化礫石層、裂縫帶和基巖；不同帶中儲集空間類型不同，砂化層以孔隙型儲層為主，砂化礫石層以裂縫型＋孔隙型儲層為主，裂縫帶以裂縫型儲層為主；從砂化層到裂縫帶，儲層的孔隙度逐漸降低，裂縫越來越髮育，儲層的滲透率從裂縫帶到砂化層和基巖帶依次降低；優質儲層主要髮育于砂化層、砂化礫石層和裂縫帶中，儲集空間類型主要為裂縫-孔洞型；儲層的孔隙度主要受錶生喀斯特作用（包括風化作用）控製，裂縫主要受變形彊度和斷裂的控製。砂化層、砂化礫石層的厚度受錶生喀斯特作用控製，裂縫帶的髮育與構造作用密切相關。砂化礫石層和裂縫帶以高的滲透率和最大的厚度而成為風化殼型潛山最為重要的儲層。
봉래9-1유전위우묘서북철기，시한견적대형중생계화강암유전，저층발육규률시제약감탐개발적관건문제。통과대암체진행암심、측정화화학측시자료종합분석，결과표명，화강암잠산풍화각재수향상의차가화분출토양층、사화층、사화력석층、렬봉대화기암；불동대중저집공간류형불동，사화층이공극형저층위주，사화력석층이렬봉형＋공극형저층위주，렬봉대이렬봉형저층위주；종사화층도렬봉대，저층적공극도축점강저，렬봉월래월발육，저층적삼투솔종렬봉대도사화층화기암대의차강저；우질저층주요발육우사화층、사화력석층화렬봉대중，저집공간류형주요위렬봉-공동형；저층적공극도주요수표생객사특작용（포괄풍화작용）공제，렬봉주요수변형강도화단렬적공제。사화층、사화력석층적후도수표생객사특작용공제，렬봉대적발육여구조작용밀절상관。사화력석층화렬봉대이고적삼투솔화최대적후도이성위풍화각형잠산최위중요적저층。
Penglai 9-1 oilfield is situated on the north salient of Miaoxi in Bohai Bay Basin.It is a rare large-scale Mesozoic granite oil-field. Reservoir distribution regularities are the key factors to influence the exploration and exploitation. This paper comprehensively analyzes the core, log response,porosity and permeability of the orebody.The results show that,from the top to bottom, the granite weathering crust can be classified as the clay zone,sandy weathering zone,the pebbly weathering zone,the fissured zone and the fresh basement zone.The high-quality reservoirs mainly develop in the sandy and pebbly weathering zones and their main reservoir space type belongs to type of pore-fissure.The types of the reservoir space change with different weathering sub-zones.The reservoirs in the sandy weathering zone,the pebbly weathering zone and the fissured zone have reservoir space types of pore,pore-fissure and fissure,respectively.The reservoir porosity decreases gradually and the fissure develops increasingly from the sandy weathering zone to the fissured zone, but the reservoir permeability decreases from the fissured zone,the sandy weathering zone to the fresh basement zone.The weathering intensity is responsible for the development of the pores and the deformation intensity and faulting dominate over the development of the fissures. The high permeability and huge thickness of the sandy weathering zone make it become the most important reservoirs in the buried hill weathering crust.
