中国煤炭地质
中國煤炭地質
중국매탄지질
COAL GEOLOGY OF CHINA
2013年
7期
37-41,58
,共6页
热储构造%盖层%热储模式%勘查方向%开发利用%湖州地区
熱儲構造%蓋層%熱儲模式%勘查方嚮%開髮利用%湖州地區
열저구조%개층%열저모식%감사방향%개발이용%호주지구
geothermal reservoir structure%overburden%geothermal reservoir model%exploration orientation%exploitation and utilization%Huzhou area
湖州地区地处杭嘉湖平原，地热资源开发具有良好的前提条件。以往的地质勘查工作中，由于上部白垩系和侏罗系较厚，对深部钻探控制程度不够，影响了该区地热资源的开发利用。在分析该区地层、含水层，特别是断裂构造的基础上，对区内的热储特征进行了研究，指出：区内热源主要来自区域大地热流；盖层主要为分布连续是，且受断裂构造影响相对较少的侏罗系及白垩系；热储层有二叠系长兴组、栖霞组，石炭系船组、黄龙组以灰岩为主的灰岩热储和由泥盆系五通组、志留系茅口组砂岩组成的砂岩热储；热储通道为区内发育的深大断裂及其次生构造。构建了区域地热模式。根据地热赋存状态、盖层条件等，结合当前地热开发现状，将湖州地区划分为四个地热分区，认为Ⅲ区地热开发条件为最好，是首选区域，以控制层状热储（石炭、二叠系灰岩）为主；Ⅱ区次之；Ⅰ区断裂发育，缺乏有效盖层条件，若开发地热资源，则应以寻找深层对流型热储（深大断裂）为主；Ⅳ区因盖层厚度偏大，地质情况不明，现阶段开发地热资源需慎重。该研究对指导下一阶段区域性地热勘查工作具有重要意义。
湖州地區地處杭嘉湖平原，地熱資源開髮具有良好的前提條件。以往的地質勘查工作中，由于上部白堊繫和侏囉繫較厚，對深部鑽探控製程度不夠，影響瞭該區地熱資源的開髮利用。在分析該區地層、含水層，特彆是斷裂構造的基礎上，對區內的熱儲特徵進行瞭研究，指齣：區內熱源主要來自區域大地熱流；蓋層主要為分佈連續是，且受斷裂構造影響相對較少的侏囉繫及白堊繫；熱儲層有二疊繫長興組、棲霞組，石炭繫船組、黃龍組以灰巖為主的灰巖熱儲和由泥盆繫五通組、誌留繫茅口組砂巖組成的砂巖熱儲；熱儲通道為區內髮育的深大斷裂及其次生構造。構建瞭區域地熱模式。根據地熱賦存狀態、蓋層條件等，結閤噹前地熱開髮現狀，將湖州地區劃分為四箇地熱分區，認為Ⅲ區地熱開髮條件為最好，是首選區域，以控製層狀熱儲（石炭、二疊繫灰巖）為主；Ⅱ區次之；Ⅰ區斷裂髮育，缺乏有效蓋層條件，若開髮地熱資源，則應以尋找深層對流型熱儲（深大斷裂）為主；Ⅳ區因蓋層厚度偏大，地質情況不明，現階段開髮地熱資源需慎重。該研究對指導下一階段區域性地熱勘查工作具有重要意義。
호주지구지처항가호평원，지열자원개발구유량호적전제조건。이왕적지질감사공작중，유우상부백성계화주라계교후，대심부찬탐공제정도불구，영향료해구지열자원적개발이용。재분석해구지층、함수층，특별시단렬구조적기출상，대구내적열저특정진행료연구，지출：구내열원주요래자구역대지열류；개층주요위분포련속시，차수단렬구조영향상대교소적주라계급백성계；열저층유이첩계장흥조、서하조，석탄계선조、황룡조이회암위주적회암열저화유니분계오통조、지류계모구조사암조성적사암열저；열저통도위구내발육적심대단렬급기차생구조。구건료구역지열모식。근거지열부존상태、개층조건등，결합당전지열개발현상，장호주지구화분위사개지열분구，인위Ⅲ구지열개발조건위최호，시수선구역，이공제층상열저（석탄、이첩계회암）위주；Ⅱ구차지；Ⅰ구단렬발육，결핍유효개층조건，약개발지열자원，칙응이심조심층대류형열저（심대단렬）위주；Ⅳ구인개층후도편대，지질정황불명，현계단개발지열자원수신중。해연구대지도하일계단구역성지열감사공작구유중요의의。
The Huzhou area is situated on the Hangzhou-Jiaxing-Huzhou plain with good prerequisites of geothermal resource exploita-tion. According to previous geological exploration data, since the thick upper part Cretaceous and Jurassic strata cause insufficient deep part drilling control extent, and impact geothermal resource exploitation and utilization in the area. Based on stratigraphic, aqui-fer, especially faulted structural analysis in the area, carried out geothermal reservoir characteristic study and pointed out that the heat source in the area is from regional terrestrial heat flow. The overburden is continuously distributed Jurassic and Cretaceous strata and less impact from faulted structures. Geothermal reservoirs have Permian Changxing Formation, Qixia Formation, Carboniferous Chuan-shan Formation, Huanglong Formation mainly limestone constitutive limestone geothermal reservoirs and Devonian Wutong Formation, Silurian Maokou Formation sandstone constitutive sandstone geothermal reservoirs; thermal channels have discordogenic faults and their secondary structures, there out regional geothermal model. Based on geothermal occurrence and overburden conditions, combined with present geothermal exploitation status, divided Huzhou area into 4 geothermal subareas, and considered that the subarea III has best exploitation condition, thus the preferred region, mainly to control the layered geothermal reservoirs (Permo-Carboniferous lime-stone); subarea II is the second; subarea I has developed faults, lack of effective overburden, if need to exploit geothermal resource, should to find out deep convection type geothermal reservoir (i.e. discordogenic fault) mainly;subarea IV because of thick overburden, thus unidentified geological condition, if need to exploit geothermal resource at present, should be careful. The study is of far reaching importance to guide next stage regional geothermal exploration.
