CAJ | 학술논문

通南巴地区膏盐层层位稳定，形态分布一般平稳连续；当上、下能干层（白云岩层）受到褶皱及断层影响发生形变时，膏盐层呈丘状、楔状、纺锤状等异常膏盐体形态。膏盐层具有多层分布（57～110层）、累计厚度大（273～415 m）的特征，其空间展布与上、下能干层的形态和构造特征关系密切：①白云岩岩层的初始主波长大于膏盐层厚度，能干层间及其所夹膏盐层互相影响，膏盐层变形受接触应变带影响较大，易于形成不协调褶皱；②受应力、温度、流体等因素影响，膏盐岩容易发生蠕变断裂，并在上、下能干层断裂的触发下，发生蠕变流动，形成异常膏盐体。多层分布的膏盐层其封闭能力较单一、巨厚膏盐层的封闭能力弱；异常膏盐体的厚度显著增大，其周围可能是油气勘探的有利场所。
통남파지구고염층층위은정，형태분포일반평은련속；당상、하능간층（백운암층）수도습추급단층영향발생형변시，고염층정구상、설상、방추상등이상고염체형태。고염층구유다층분포（57～110층）、루계후도대（273～415 m）적특정，기공간전포여상、하능간층적형태화구조특정관계밀절：①백운암암층적초시주파장대우고염층후도，능간층간급기소협고염층호상영향，고염층변형수접촉응변대영향교대，역우형성불협조습추；②수응력、온도、류체등인소영향，고염암용역발생연변단렬，병재상、하능간층단렬적촉발하，발생연변류동，형성이상고염체。다층분포적고염층기봉폐능력교단일、거후고염층적봉폐능력약；이상고염체적후도현저증대，기주위가능시유기감탐적유리장소。
The vertical distribution and geometry of evaporates in Tongnanba area are generally steady and continuous . However,when the overlying and underlying competent dolomite are deformed by folds and faults ,they occur in special shapes like moundy ,wedge and spindle set .The evaporates are characterized by multilayers ( 57 -110 ) , a large gross thickness (273-415m),and close relationship with the shapes and structures of competent beds .The initial dominant wavelengths of the dolomite layers are larger than the thickness of evaporates ,the evaporates and the surrounding multiple competent beds interact with each other ,and the contact strain zones have relatively large influences on the evaporates , therefore ,the evaporates are apt to form disharmonious folds .The evaporates are easy to form creep fractures due to the influences of stress , temperature , fluid and other factors , and abnormally-shaped evaporate bodies are developed due to faulting of the competent beds .It was proved that sealing capability of multilayer evaporates was weaker than that of single evaporates with large thickness .The thickness of evaporate body enlarges significantly when they get abnormally-shaped , thus the surrounding areas are favorable targets for hydrocarbon exploration .