矿区煤层气开发的储层类型划分1.23ngg排版

6个参数为煤储层类型划分的主要指标；借鉴各个指标参数传统临层开发类型。其中：低丰度系列储层类型的资源条件有限，暂不考虑开发；中中压中应力中硬煤、高压低应力硬煤、高压特低应力中硬煤等煤储层类型资源条件好，利于煤层气运移产出，是煤层气：号：p618.11文章标识码 文章编号SubdivisionaboutCoalreservoirtypesofdeveloCoalbedmethaneinFukangminingarea:Itisverynecessarytoreducetheblindnessoftheselectingcoalbedmethanedevelopmentprocessingselectioninasmallscalebyfinelydistinctionsoncoalreservoirtypes.Somemaininfluentindexparametersaboutcoalbedmethanedevelopmentprocessingselectionweresystematicyzed.Theclassificationindexessuchasthefaultstructure,resourceabundance,groundwaterdynamicconditions,reservoirpressuregradient,stressgradientandcoalbodystructurecombinationsweredeterminedasthemainindexes.Accordingtothetraditionalcriticalvaluesaboutthisclassificationindexes,combinedwiththestatisticsrelationsamongtheindexesandaveragedailygasproductionbytheactualdevelopmentdataandrocknamedpartitioningmethod,thesecriticalindexesofclassificationindexeswerepreciselydetermined.Accordingtotheseclassificationindexesandcriticalvalues,A2coalseaminwesternofFukangminewasdividedinto13typesofcoalreservoirunits,12kindsofcoalreservoirdevelopmenttypes.Amongthem,thecoalreservoirdevelopmenttypesoflowabundanceseriesareoflimitedgasresources,theseblocksarenottakenintoaccountthedevelopment.Thesecoalreservoirssuchaslow-highresourceabundance/mediumpressuregradient/mediumstressgradient/mediumhardcoalreservoir,highresourceabundance/mediumpressuregradient/lowstressgradient/hardcoalreservoir,highresourceabundance/highpressuregradient/ultralowstressgradient/mediumhardcoalreservoirareofbetterresourceconditions,theseconditionsaboutmigrationandoutputofCBMareadvantageous.TheseblocksarepreferredareasforCBMdevelopment.Othercoalreservoirtypesneedconsideringwithdevelopmentprocessingtypes.Theaccuracyabouttheclassificationofthecoalreservoirtypesisverifiedbythefieldgasproductiondata.Thestudyonclassificationmethodaboutcoalreservoirdevelopmenttypeswithinasmallrangeofareascanprovidereferenceandguidanceforselectionofdevelopmentwellstypesand:coalbedmethane;coalreservoirtypes;resourceabundance;

（15HASTIT050）N 丁家湾煤 性指导。从动力条件和能量系统角度出N 丁家湾煤

层气有利区预测精度较高[2]；但当评价分数大致相同时如何选择开发工艺却不能给出较正确的回答基于水补给类型地质构造条件等进行的开发类型和开发模型的划分，现场指导尺度较大[9]系统分析和筛选影响开发工艺选型关键参阜康矿区位于 市东北化大。该区煤层主要发育在窑组和八道主要发育A2，A5煤层其中A2煤层厚4.5～1所示。煤层气开发储层类型划分指

1A2Fig.1FloorstructuraldiagramaboutA2coalseaminwesternofFukangminingarea一定的资源量是进行煤层气开发的物资源丰度对单井控制范围内煤层气产出量煤储层渗透率是煤层裂隙发育程度的要建立煤层与地面的连接通道，即钻井煤体结构一定程度上反映了煤的破坏

若研究区内断层的断距不足以把目的<0.5×108m3/km2、0.5~1.0×108m3/km2、0.5~2.0×108m3/km范围内资源丰度进一步划分为<0.5×108m3/km2、0.5~1.0×108m3/km21.0~1.5×108m3/km2（Ⅴ（Ⅳ（Ⅲ（Ⅱ围岩含水层对煤层补给量的差异导致平均日产水量可以以<5m3/d、5~10m3/d、0.93~1.0MPa/hm、>1.0MPa/hm为界划分为储层压力梯度>0.8MPa/hm时，煤层气井产气效果好；0.6~0.8MPa/hm好；当<0.4MPa/hm时，产气效果很差。因此以>1.0MPa/hm、0.8~1.0MPa/hm、0.6~0.8MPa/hm、0.4~0.6MPa/hm（A（B（C（D（（m30 储层压力梯度2Fig.2Relationshipsbetweencoalreservoirpressuregradientandaveragedailygasproduction2MPa/hm为界划<01mD0.~10m>10mD为界划分为的渗透率<0.1mD，这一划分方案显然无法（3率<001mD和0.01~01mD有着明显的产气差异。因此，渗透率可划分为<0.01mD、0.010.1mD、0.1~.0D、1.05.0mD和>5.0mD，依次称为特低渗、较低渗、低平地应力梯度与渗透率关系[11，以>2.0（d（c（a

（1；碎裂煤（2（3；碎粒煤（4（（m300.00.81.01.82.02.83.03.2渗透率3Fig.3Relationshipsbetweencoalreservoirpermeabilityandaveragedailygasproduction根据储层类型划分的评价指标及临界矿区西部规模较大的断层主要有阜康和南逆断层，各断层基本参数见表11Table.1Listaboutmainfaultattributeparametersinthewesternofthemining 长度45-南逆断 北东东 南 夹皮沟逆掩断 东南转近东西 南 N丁断N丁断

度为中；阜康向斜部位有利于煤层气保存，含气量相对高，煤层气资源丰度为中-高类型南逆断层南部煤层倾角较大断2，进而得出研究区不同煤体结构分布

4A2Fig.4PreliminaryclassificationresultsaboutA2coalreservoirtypeunitsinwesternofFukangmining

6。2密 煤体结构组 判 188.3-397.5-1.23- 75%原生煤+25%碎裂煤、碎 硬煤1000.4-403.1-1.19-密 煤体结构组 判 188.3-397.5-1.23- 75%原生煤+25%碎裂煤、碎 硬煤1000.4-403.1-1.19- 85原生煤+15%碎裂煤、碎粒 硬1649.3-430.5-65%碎裂煤+35%1.24- 煤313.4-363.5-1.21- 70%碎裂煤+30%碎粒煤、夹 中硬462.8-413.5-65%糜棱煤+35%1.37- 煤263.7-421.3-55%糜棱煤+45%1.37- 煤个储层类型单元，共12种储层类型。依次为低丰低压低应力粉软煤、中压中应力中应力碎软煤、中

中中压中应力中硬煤中压低应、、N丁断 北部N丁断

3差别不大的情况下，煤体结构、储层压力、地应力对煤层气井的产气效果影响比较明/4通过阜康矿区煤层气开发的煤储层类

5A2煤储层压力梯度和 丁 丁

13个储层类型单元。资源层气井部署；中中压中应力中硬煤、、中压低应力硬煤高压特低应力中硬煤、

6A2Fig.6ClassificationresultsaboutA2coalreservoirinthewesternofFukangminingarea目前矿区阜康向斜西部已经布置有一些煤层气生产井，根据已划分的储层类型，这些井基本上分布在三种储层类型单元内，将这些煤层气井的产气数据与储层类型进行对比，结果如表33Table3Thecomparisonaboutgas平均日产气量AccumulationDynamics平均日产气量AccumulationDynamicsandReservoirControl[M].BeijingSciencePress,2012.07:128-[3]ButalaSJM，MedinaJC，TaylorTQBartholomewCH，LeeML.2000.Mechanismskineticsofreactionsleadingtonaturalgasduringcoalmaturation[J].EnergyandFuels,235-[4]RamaswamyG.2002.Afieldevidence

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