Study on foam sand consolidation system in horizontal wells

A kind of chemical sand consolidation system, which is stable with low density and good rheology, has been developed by single factor way, and its formula is 0.4%AOS+3% solid particle foam stabilizer +8% firming agent +0.3% coupling agent +60% epoxy emulsion. Then consolidation properties of foamed consolidation system are evaluated and effects of consolidating temperature, consolidating time and mean sizes of quartz sands on consolidation performances has been examined. It turns out that the prepared consolidation system has excellent consolidating effects with a temperature range of 60℃ to 90℃ and the compressive strength of consolidated column can reach 9.5 MPa. In addition, material resistance of consolidated column has been investigated, and the results show that the system has good resistance to acid, alkali, water and oil, displaying nice reservoir adaptation.