B
ecause of thedemand for
oil and gas, inChina’s Tarim
Basin, CNPChas drilled
wellswith a record vertical depth
of 26 522 ft andwith a record static
bottomhole temperature (BHT) of
412˚F. Previously used cementing
additives canmeet the cementing
requirements of conventional
wells, but they are usually unable
meet the requirements of new
cementing jobs because they lack
certain features demandedof
themby these newwells. For these
moredemanding jobs, cementing
Zhonghui Liu,
Landy Energy Services, Inc.,
USA andWei Wang,
Landy Energy Services, Inc.,
China, detail the
characteristics of intelligent
temperature adaptable
cementing additives (ITACA)
for conventional, super HPHT
and deepwells.
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