中国煤炭地质
中國煤炭地質
중국매탄지질
Coal Geology of China
2015年
11期
62-65
,共4页
袁峰%马丽%冯西会%汶小岗%许德才
袁峰%馬麗%馮西會%汶小崗%許德纔
원봉%마려%풍서회%문소강%허덕재
砂岩型铀矿%地质统计学反演%岩性概率模型%电阻率剖面%岩性预测
砂巖型鈾礦%地質統計學反縯%巖性概率模型%電阻率剖麵%巖性預測
사암형유광%지질통계학반연%암성개솔모형%전조솔부면%암성예측
sandstone-type U-ore%geostatistics inversion%lithologic probability model%resistivity profile%lithology prediction
砂岩型铀矿主要分布在砂与泥岩互层中,地层的分布特点是横向上具有一定连续性,而纵向上相变快、厚度薄,给地震预测带来较大困难。针对内蒙古自治区测老庙盆地地层层数多,厚度薄的特点,采用地质统计学反演的方法预测有利于成铀岩层。通过比较地层岩性与物理属性的相关程度,发现电阻率对岩性具有较高的灵敏度。依据测井资料建立岩性概率模型,以电阻率剖面与岩性概率模型约束地质统计学反演,得到地层岩性剖面。地层岩性剖面表明:该区铀矿主要集中在深度100 m左右及180~260 m二个层段,其岩性结构表现为砂泥-细、粗砂岩-砂泥/泥。
砂巖型鈾礦主要分佈在砂與泥巖互層中,地層的分佈特點是橫嚮上具有一定連續性,而縱嚮上相變快、厚度薄,給地震預測帶來較大睏難。針對內矇古自治區測老廟盆地地層層數多,厚度薄的特點,採用地質統計學反縯的方法預測有利于成鈾巖層。通過比較地層巖性與物理屬性的相關程度,髮現電阻率對巖性具有較高的靈敏度。依據測井資料建立巖性概率模型,以電阻率剖麵與巖性概率模型約束地質統計學反縯,得到地層巖性剖麵。地層巖性剖麵錶明:該區鈾礦主要集中在深度100 m左右及180~260 m二箇層段,其巖性結構錶現為砂泥-細、粗砂巖-砂泥/泥。
사암형유광주요분포재사여니암호층중,지층적분포특점시횡향상구유일정련속성,이종향상상변쾌、후도박,급지진예측대래교대곤난。침대내몽고자치구측로묘분지지층층수다,후도박적특점,채용지질통계학반연적방법예측유리우성유암층。통과비교지층암성여물리속성적상관정도,발현전조솔대암성구유교고적령민도。의거측정자료건립암성개솔모형,이전조솔부면여암성개솔모형약속지질통계학반연,득도지층암성부면。지층암성부면표명:해구유광주요집중재심도100 m좌우급180~260 m이개층단,기암성결구표현위사니-세、조사암-사니/니。
The sandstone-type U-ore is mainly distributed in alternating sandstone and mudstone. Strata distribution pattern presents certain degree of continuity horizontally, while facies variable and thickness thinning vertically thus bring on more difficulties in seis?mic prospecting prediction. In allusion to multilayered and thin thickness strata in the Celaomiao Basin, Inner Mongolia, the geostatis?tics inversion method to predict favorable uranium-bearing strata is used. Through correlativity comparison between strata lithology and physical attribute have found rather high sensitivity of resistivity on lithology. Based on logging data, the lithologic probability mod?el has been modeled, through resistivity profile and the model constrained geostatistics inversion to get lithologic sections. The sections have shown that the U-ore in the area is concentrated in depths about 100m and 180~260m two sectors;the lithologic pattern is sandy mudstone-fine, course sandstone-sandy mudstone and mudstone.