原生孔

煤的原生孔结构对煤层渗透性的影响

Influence of Microspore Structure of Coal on Coal Seam Permeability

孔隙有两种类型，中生界以上地层以原生孔为主；

Pores may fall in two types , with primary pores predominating in Mesozoic and Cenozoic strata and secondary pore in the Paleozoic .

通过试验研究，考察了煤的低温氮吸附等温线及吸附回线，并探讨了孔形意义，分析了煤的原生孔结构对煤层渗透性的影响。

Through the research on trial , we have research into the adsorption isotherm and adsorption loop that the coal adsorbed low-temperature nitrogen , have probed into the meaning of hole shape and analyzed the influence of the microspore structure of coal on the coal seam permeability .

储集空间主要有原生孔、溶蚀粒间孔、溶蚀粒内孔和溶蚀填隙物孔，储层孔隙结构以中到差级别为主，好储层发育大量次生孔隙，其孔隙结构以中级别居多。

The main storage space in the target layer includes corrosion intraparticle pore , corrosion interparticle pore and corrosion interstitial pore . The reservoir pore structures are mainly medium – poor . Pore structures of the excellent reservoirs , in which secondary pores developed , are mainly medium .

该区发育有4个构造带：前陆冲断带储层类型为孔隙-裂缝型，以溶蚀孔和裂缝为主，见少量原生残余孔；

The reservoir of thrust belt was mainly of pore-fracture type , dissolved pore , fracture and a little primary pore are mainly interstice of the reservoir .

下砂岩段储层岩性为岩屑砂岩，储集空间类型主要为剩余原生粒间孔，压实作用是影响储层物性的主要因素。

Compaction is the important factor affecting the reservoir petrophysics .

剩余原生粒间孔是成岩早期淀粘土及石英加大形成的，它们围绕碎屑边部分布。

Residue original intergranular pore has been preserved by the authigenic clay minerals and quartz overgrowth .

研究区主要孔隙类型为粒间溶孔、剩余粒间孔和粒内溶孔，原生粒间孔、裂缝和铸模孔较少。

The main types of pore are corrosion pore between grains , residual pore between grains and corrosion pore in grains .

储层微观储集特征发育剩余原生粒间孔、粘土矿物杂基内的微孔隙及微裂缝等储集空间类型。

Reservoir micro-accumulation is featured by development of reservoir space types including remaining primary intergranular pores , micropores and microfractures in clay mineral matrix .

孔隙类型主要为各种溶蚀孔，其次为原生粒间孔。

The type of pore is mainly vuggy porosity , and primary intergranular pores , relatively undeveloped , is as the second place among the reservoir pores .

指出，砾岩的储集空间为原生砾间孔、砾间洞、粒间缝、次生溶蚀孔和构造缝。

It is pointed out that reservoir space of conglomerate is composed of primary intergranular pore , hole and fracture , secondary denudation pore and structural fracture .

研究区营四段砾岩储层储集空间类型非常复杂，通过大量的微观分析认为，研究区主要储集空间类型为原生粒间孔、溶孔、裂隙及复合孔隙。

Through a large number of micro-analysis , the study area the main reservoir space type of native intergranular pores , solution holes , cracks and composite porosity .

储层主要类型为孔隙-裂缝型，储集空间类型按成因可分为剩余原生粒间孔、次生孔隙和洞、裂缝。

Reservoir type mainly belongs to porous-fracture type . According to the cause , reservoir space type is divided into remaining primary grained pore , secondary pore , hole and crack .

孔隙类型以原生粒间孔为主，其次为溶蚀孔、晶间孔及裂缝等次生孔隙，颗粒间以孔隙～孔隙接触式胶结类型为主。

Pore types are mainly native intergranular pore , followed by dissolution pores , intergranular holes , cracks , and other secondary porosity , particle cement type is pore to pore contact .

孔隙类型主要有残余原生粒间孔、次生孔、微孔隙和微裂缝四种，以次生孔为主要的储集空间，是油气主要的富集场所。

There are four kinds of pores , such as : remainder intergranular pore , secondary pore , micro-pore and micro-fissure . The secondary pores are major reservoir pore space , in which oil-and gas are enriched .

油藏主要岩石类型为长石砂岩，粒度主要以细粒为主，分选性较好，孔隙类型主要为原生粒间孔，其次为溶蚀孔隙，该区域延长组长2油层具有低孔低渗的特点。

The main reservoir rock types are feldspar sandstone , mainly is fine particle size , and fairly well sorted , the pore type is mainly primary intergranular pore , followed is dissolution pore , target area is low-permeability .

储集性能的差异性分析表明影响研究区储层物性变好的因素有：水下分流河道和河口坝砂体原生粒间孔保存较好，因而物性相对较好；

Diversity analysis of the capability of reservoir indicated the factors which improve the performance of reservoir in researching region includes : the Submarine distributary channel and the sandstone-body primary intergranular pore of the mouth bar preserved well , thus the reservoir property is better ;

研究发现储层孔隙类型以原生残余粒间孔、次生粒间孔隙和混合孔隙为特征。

The research finds that pores can be divided into three types : crude residual intergranular pore , induced pore and mixed pore .