中山大学学报(自然科学版)
中山大學學報(自然科學版)
중산대학학보(자연과학판)
ACTA SCIENTIARUM NATURALIUM UNIVERSITATIS SUNYATSENI
2014年
6期
78-84
,共7页
ASTER%烃蚀变%碳酸盐矿物%信息增强与提取
ASTER%烴蝕變%碳痠鹽礦物%信息增彊與提取
ASTER%경식변%탄산염광물%신식증강여제취
ASTER%hydrocarbon microseepage%carbonate minerals%information enhancement and interpretation
烃类微渗漏蚀变信息是地下深部油气藏储层在地表和近地表的直观证据,通过遥感图像进行烃蚀变解译是遥感油气勘探中的一项高效、快速和安全的新技术。该研究采用ASTER近红外数据,以烃渗漏蚀变产生的碳酸盐矿物为目标,采用主成分分析、密度分割和假彩色合成等信息增强和提取方法,获得了1589-PC3、1689-PC3、1348-PC3和5689-PC2等四个对碳酸盐具有较好增强效果的主成分因子,以X+2σ为阈值,从4幅主成分因子图像上提取了碳酸盐区域,并根据叠合结果划分为一级富集区和二级富集区。结果显示碳酸盐富集与展布结果与该区的地层分布紧密相关,与已有研究的解译结果较为一致。
烴類微滲漏蝕變信息是地下深部油氣藏儲層在地錶和近地錶的直觀證據,通過遙感圖像進行烴蝕變解譯是遙感油氣勘探中的一項高效、快速和安全的新技術。該研究採用ASTER近紅外數據,以烴滲漏蝕變產生的碳痠鹽礦物為目標,採用主成分分析、密度分割和假綵色閤成等信息增彊和提取方法,穫得瞭1589-PC3、1689-PC3、1348-PC3和5689-PC2等四箇對碳痠鹽具有較好增彊效果的主成分因子,以X+2σ為閾值,從4幅主成分因子圖像上提取瞭碳痠鹽區域,併根據疊閤結果劃分為一級富集區和二級富集區。結果顯示碳痠鹽富集與展佈結果與該區的地層分佈緊密相關,與已有研究的解譯結果較為一緻。
경류미삼루식변신식시지하심부유기장저층재지표화근지표적직관증거,통과요감도상진행경식변해역시요감유기감탐중적일항고효、쾌속화안전적신기술。해연구채용ASTER근홍외수거,이경삼루식변산생적탄산염광물위목표,채용주성분분석、밀도분할화가채색합성등신식증강화제취방법,획득료1589-PC3、1689-PC3、1348-PC3화5689-PC2등사개대탄산염구유교호증강효과적주성분인자,이X+2σ위역치,종4폭주성분인자도상상제취료탄산염구역,병근거첩합결과화분위일급부집구화이급부집구。결과현시탄산염부집여전포결과여해구적지층분포긴밀상관,여이유연구적해역결과교위일치。
Hydrocarbon microseepage induced anomaly of surface and near surface is the direct evidence for oil &gas deposit.The detection of hydrocarbon-induced anomaly by remote sensing image interpreta-tion is fast,efficient and safe.ASTER Near Infrared data were used to interpret hydrocarbon-induced car-bonate minerals.Principal component analysis (PCA),density slicing and false color composition were adopted to distinguish the goal area of clay and carbonate minerals.Four principal components showed outstanding spectral response of hydrocarbon-induced clay and carbonate minerals:5689-PC2 (the sec-ond principal component of input bands 5689),1589-PC3,1689-PC3 and 1348-PC3.Then,density sli-cing (X+2σ)was used to highlight the pixels with the largest DN (digital number)of PC images as the area of carbonate minerals.The distinguished area was categorized into the first and second classes due to the frequencies of overlay.The result suggests that hydrocarbon microseepage induced mineral assemblage is related closely to the surface sediments.Compared with the anomalous area of ETM+data,the distin-guished area from ASTER data has almost the same distribution.