科学技术与工程
科學技術與工程
과학기술여공정
SCIENCE TECHNOLOGY AND ENGINEERING
2015年
24期
34-45
,共12页
徐振宇%方朝刚%殷启春%滕龙
徐振宇%方朝剛%慇啟春%滕龍
서진우%방조강%은계춘%등룡
生物气%沉积组合%海侵旋回%海退旋回%最大海泛面
生物氣%沉積組閤%海侵鏇迴%海退鏇迴%最大海汎麵
생물기%침적조합%해침선회%해퇴선회%최대해범면
biogenic gas%depositional combination%progressive cycle%regressive cycle%the maxi-mum flooding surface
依据对江苏省启东市和海门市钻孔地层岩心沉积特征的研究，结合两个钻孔83个有机碳含量样品、28个渗透率样品的测试值和钻孔周边18个静力触探孔试气效果统计，讨论了晚第四纪以来长江三角洲河口地区的层序地层特征及生物气的勘探前景。研究表明，晚第四纪以来长江三角洲河口地区LG海侵旋回只保留了底部的河流相沉积，PG海侵旋回自下而上依次发育河流相、浅海相、三角洲相和河流相、强潮河口湾相两套不同的沉积组合。亚间冰期（ LG）海侵旋回只保留了底部侵蚀面，冰后期（ PG）海侵旋回发育一套完整的海侵-海退旋回，底部侵蚀面为该层序的底界面，最大海泛面则发育在浅海相中沉积物最细、海相性最强的淤泥质黏土层中。研究区生物气的生储盖条件优越、试气效果好，为后期的生物气勘探与开发提供了优越的条件。
依據對江囌省啟東市和海門市鑽孔地層巖心沉積特徵的研究，結閤兩箇鑽孔83箇有機碳含量樣品、28箇滲透率樣品的測試值和鑽孔週邊18箇靜力觸探孔試氣效果統計，討論瞭晚第四紀以來長江三角洲河口地區的層序地層特徵及生物氣的勘探前景。研究錶明，晚第四紀以來長江三角洲河口地區LG海侵鏇迴隻保留瞭底部的河流相沉積，PG海侵鏇迴自下而上依次髮育河流相、淺海相、三角洲相和河流相、彊潮河口灣相兩套不同的沉積組閤。亞間冰期（ LG）海侵鏇迴隻保留瞭底部侵蝕麵，冰後期（ PG）海侵鏇迴髮育一套完整的海侵-海退鏇迴，底部侵蝕麵為該層序的底界麵，最大海汎麵則髮育在淺海相中沉積物最細、海相性最彊的淤泥質黏土層中。研究區生物氣的生儲蓋條件優越、試氣效果好，為後期的生物氣勘探與開髮提供瞭優越的條件。
의거대강소성계동시화해문시찬공지층암심침적특정적연구，결합량개찬공83개유궤탄함량양품、28개삼투솔양품적측시치화찬공주변18개정력촉탐공시기효과통계，토론료만제사기이래장강삼각주하구지구적층서지층특정급생물기적감탐전경。연구표명，만제사기이래장강삼각주하구지구LG해침선회지보류료저부적하류상침적，PG해침선회자하이상의차발육하류상、천해상、삼각주상화하류상、강조하구만상량투불동적침적조합。아간빙기（ LG）해침선회지보류료저부침식면，빙후기（ PG）해침선회발육일투완정적해침-해퇴선회，저부침식면위해층서적저계면，최대해범면칙발육재천해상중침적물최세、해상성최강적어니질점토층중。연구구생물기적생저개조건우월、시기효과호，위후기적생물기감탐여개발제공료우월적조건。
On the basis of analysis on the sedimentary characteristics of drilling cores located in Qidong city and Haimen city of Jiangsu province and test values of 83 organic carbon content samples and 28 permeability samples and gas production test effect statistics of 18 cone penetration test holes, the Changjiang delta estuary sequence stra-tigraphic character and the biogenic gas exploration prospect in later Quaternary are discussed.The research shows that only fluvial deposition reserved at the progressive cycle telophase of subinterglaciation( LG) , while the regres-sive cycle postglacial period( PG) contains two sets of depositional combination including fluvial facies, shallow se-aphase, delta phase and fluvial facies, strong tide estuarine facies from top to bottom.The erosion surface at the bottom is reserved only in the progressive cycle telophase of subinterglaciation( LG) while a set of complete trans-gression-regression cycle is developed in the regressive cycle postglacial period(PG).The erosion surface at the bottom is the bottom of the sedimentary sequence interface.The maximum flooding surface develops in the silt clay layer which has the finest sediments and the strongest marine resistance.The gas-producing zone, reservoir and overlying strata of the biogenic gas in the study area are superior, and the testing effect is good.It provides superior conditions for the exploration and development of biogas in the later.
