Abstract
Geochemical studies were carried on formation fluids including gas, oil, condensate and formation water in reservoir rocks in the Green Tuff, especially in the Mitsuke oil field, and in the Shiunji, Yoshii-Higashi Kashiwazaki and Minami Nagaoka-Katakai gas fields.Properties of oils and condensates seem to depend on temperatures of reservoir rocks, whereas those of gases reflect the conditions of their generation.The origin of gases is considered to be thermogenic based on the data of δ13C1 and C1/∑Cn. Both data of δ13C1 and i-C4/n-C4 indicate that the level of maturation of source rocks in the Minami Nagaoka-Katakai and Yoshii-Higashi Kashiwazaki gas fields is higher than that in the Mitsuke oil field and Shiunji gas field.Chemical composition of formation waters is closely related to alteration of reservoir rocks. The Cl- contents of formation waters in the Mitsuke oil field increase from SW to NE, which suggests that interstitial waters in the Teradomari formation flow from SW to NE.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Japanese Association for Petroleum Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
