塔河六七区鹰山组-巴楚组混积特征研究
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摘要
受加里东期-海西期构造运动及持续海平面升降变化影响,塔河油田六七区沉积环境复杂多变,中下奥陶统鹰山组和下石炭统巴楚组发育陆屑-碳酸盐混积岩。结合岩心、薄片及测井资料综合分析,混积岩据混积强度分为混积型碳酸盐岩、混积型碎屑岩、高度混积岩。据沉积背景及沉积特征,混积岩成因类型可分为岩溶穿插再沉积型(岩溶型)和相缘渐变型(相变型)。其中,混积型碳酸盐岩和混积型碎屑岩为岩溶成因,高度混积岩为相变成因。此外,混积岩储集空间发育,储集类型主要包括原生粒间孔、次生溶蚀孔缝和构造裂隙,岩溶型混积岩较相变型混积岩储集性能较好。混积岩孔缝中见含油显示,相关油气意义值得进一步研究。
The six and seven area of Tahe Oilfield experienced complicated sedimentary environment and developed mixed deposition about debirs and carbonate because of Caledonian movement and Hercynian movement. The product of mixed deposition was divided into mixed clastic,mixed carbonate and high-mixed rocks via observation of core and slices.According to sedimentary background and characters,mixed deposition could be classified into two kinds:by gardual facies change(for mixed clastic,mixed carbonate)and by palaeokarst(for high- mixed rocks).Moreover, the peperite has a better reservoir property,the reservoir space include primary pore,which existed as intergranular pore of mixed clastic,and secondary pore,which was mainly corrosive void and structural fracture in mixed carbonate and high-mixed rocks that were more meaningful.Oil exited in the mixed product,which implied the reservoir meaning in the mixed deposition,and further research should be conducted.
The six and seven area of Tahe Oilfield experienced complicated sedimentary environment and developed mixed deposition about debirs and carbonate because of Caledonian movement and Hercynian movement. The product of mixed deposition was divided into mixed clastic,mixed carbonate and high-mixed rocks via observation of core and slices.According to sedimentary background and characters,mixed deposition could be classified into two kinds:by gardual facies change(for mixed clastic,mixed carbonate)and by palaeokarst(for high- mixed rocks).Moreover, the peperite has a better reservoir property,the reservoir space include primary pore,which existed as intergranular pore of mixed clastic,and secondary pore,which was mainly corrosive void and structural fracture in mixed carbonate and high-mixed rocks that were more meaningful.Oil exited in the mixed product,which implied the reservoir meaning in the mixed deposition,and further research should be conducted.
引文
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[2]付美燕,张哨楠,赵秀,等.塔里木盆地巴楚——麦盖提地区石炭系混合沉积研究[J].古地理学报,2012,14(2).
[3]沙庆安.混合沉积和混积岩的讨论[J].古地理学报,2001,3(3):64-66.
[4]董桂玉,何幼斌,陈洪德,等.惠民凹陷沙一中湖相碳酸盐与陆源碎屑混合沉积——以山东商河地区为例[J].沉积学报,2007,25(3):344-350.
[5]赵会民.辽河西部凹陷雷家地区古近系沙四段混合沉积特征研究[J].沉积学报,2012,30(2):284-290.
[6]董桂玉,陈洪德,何幼斌,等.陆源碎屑与碳酸盐混合沉积研究中的几点思考[J].地球科学进展,2007,22(9):932-939.
[7]冯进来,胡凯,曹剑,等.陆源碎屑与碳酸盐混积岩及其油气地质意义[J].高校地质学报,2011,17(2):297-307.
[8]杨朝青,沙庆安.云南曲靖中泥盆统曲靖组的沉积环境:一种陆源碎屑与海相碳酸盐的混合沉积[J].沉积学报,1990,8(2):59-66.
[9]丁一,李智武,冯逢,等.川中地区下侏罗统自流井组大安寨段湖相混合沉积及其致密油勘探意义[J].地质论评,2013,59(2):390-399.
[10]董桂玉,陈洪德,李君文,等.环渤海湾盆地寒武系混合沉积研究[J].地质学报,2009,83(6):801-811.
[11]张雄华.混积岩的分类和成因[J].地质科技情报,2000,19(4):32-34.
[12]张雄华.雪峰古陆边缘上石炭统陆源碎屑和碳酸盐混合沉积[J].地层学杂志,2003,27(1):54-58.
[13]游李伟,彭军,汪彦,等.高频层序研究在碳酸盐岩储层对比中的应用[J].新疆地质,2006,24(1):59-63.
[14]冯明友,张帆,王兴志,等.塔河油田巴楚组底部砂泥岩段沉积特征[J].现代地质,2010,24(5):919-924.
[15]吴其林,傅恒,黄海平,等.塔里木盆地塔河地区下石炭统巴楚组沉积演化[J].沉积与特提斯地质,2008,28(3):79-83.
[16]朱李.塔河西南部巴楚组-志留系沉积相及地震储层预测[D].西安:西北大学,2007.
[17]刘大锰,杨起,周春光,等.华北晚古生代煤中黄铁矿赋存特征与地质成因研究[J].地球化学,1999,28(4):340-350.
[18]周文,李秀华,金文辉,等.塔河奥陶系油藏断裂对古岩溶的控制作用[J].岩石学报,2011,27(8):2339-2348.
[19]罗顺社,刘魁元,何幼斌,等.渤南洼陷沙四段陆源碎屑与碳酸盐混合沉积特征与模式[J].江汉石油学院学报,2004,26(4):19-21.
[20]刘文,李永宏,张涛,等.塔河油田奥陶系碳酸盐岩沉积相及地层学研究[J].石油实验地质,2002,24(2):104-109.