Shale plugging inhibitor for shale gas horizontal well drilling and preparation method thereof

A technology for horizontal wells and inhibitors, which is applied in wellbore/well components, chemical instruments and methods, earthwork drilling and production, etc. It can solve the problem that the rheological properties of high molecular weight polymers are greatly affected, and the temperature resistance of treatment agents needs to be improved. The problems such as the inability of the agent to be effectively blocked, etc., to achieve the effects of easy control, mild reaction conditions, and good thermal stability
CN109837073BActive Publication Date: 2021-01-19滨州市立德石油科技有限公司
8 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
滨州市立德石油科技有限公司
Publication Date
2021-01-19

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a shale plugging inhibitor for drilling of a shale gas horizontal well and a preparation method thereof. The inhibitor is a mixture obtained by mixing novel low-molecular-weight polymer AMPS / THAAB / MMA, oil and water according to a certain ratio. The preparation method of the low-molecular-weight polymer AMPS / THAAB / MMA comprises the following steps: adding trihydroxyethyl allyl ammonium bromide, methyl methacrylate and chain transfer agent isopropyl alcohol into 2-acrylamide-2-methylpropanesulfonic acid, and adding K2S2O8 and NaHSO3 to carry out polymerization reactionto obtain a product. The inhibitor can achieve the aims of simultaneously inhibiting hydration expansion and dispersion of shale, has a good shale blocking inhibition effect and can be directly applied to shale gas development drilling.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a shale plugging inhibitor for shale gas horizontal well drilling and a preparation method thereof. In particular, it is a shale plugging inhibitor for water-based drilling fluid used in problem formations such as wellbore instability and collapse caused by shale hydration expansion during the drilling of shale gas horizontal wells. Background technique

[0002] With the advent of the shale gas revolution, the development of shale gas has attracted more and more attention from the petroleum industry. In the process of shale gas drilling, the hydration expansion and dispersion of shale will lead to a series of problems such as wellbore instability, bit bagging and wellbore purification difficulties. Wellbore stability is a very complicated worldwide problem often encountered in oil and gas drilling engineering. According to the statistics. The world oil industry spends as much as US$700 million on handling wellbore stability ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More