・784・
新疆石油地质
2008短
结构破坏产生二次沉淀,对储集层造成伤害。而在酸
化设计中酸液类型和酸液质量分数是根据储集层的
具体特性来定的。
(4)模拟关井时间不合理酸敏评价标准规定做
砂岩酸敏感性实验模拟关井时间为:包括注酸在内的
酸反应时间为l h.实际酸化中关井时间要根据储集
层岩石学特征、地层温度、酸液类型等因素综合确定。
(5)注酸量不舍理酸敏评价标准规定做砂岩盐
酸酸敏感性实验注入0.5一1.0倍孑L隙体积质量分数为
15%的HCl.实际酸化中用酸量要根据储集层特征、
酸液类型、地层伤害情况等因素综合确定。
4结论
(1)现行的酸敏评价标准在实验设计中考虑油藏
酸化措施的实际过程不足,故不合理处较多。
(2)原酸敏评价标准不能作为储集层能否实施酸
化和酸化是否有效的依据。只要合理确定酸液配方和
适当的酸化工艺,酸敏性储集层酸化也会取得很好
的酸化效果。
(3)应考虑对“SY厂r 5358—2002储层敏感性流动
实验评价方法”进一步修订和完善。
参考文献:
[1]
[2]
[3]
[4]
[5]
SY,r
5358—2002储集层敏感性流动实验评价方法.
Bryant S乙BuUer D
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from
acid
treatment
[J].SPE
Production Engineering,1990,l 1:455-460.
Hartman R
L
Leceff B.Frenier
W,et耐.Acid
sensitive
aluminosilicates:dissolution
kinetics and fluid
selection
for
matrix stimulation
treatments[J].SPE
82267,2003.
贺承祖,华明琪.酸敏研究进展[J】.钻井液与完井液,
20()2,19(4):33-36
Baker
J
C,Uwins P
J
R,Mackinnon I D R.ESEM study of
authigenic
chlorite acid
sensitivity
in sandstone reservoim
[J].J.ofPetr01.Sei.and
Eng.,1993,8(3):269-277.
0n Acid Sensitivity Standards:Defects Analysis
LIU Hong—xian,ZHAO Li・qiang,CHEN
ji・mei,LIU
Ping-li
(Institute
of Petroleum
Engineering,Southwest
Petroleum
University,Cbengdu,Sichuan 610500,China)
Abstract:The
reservoir of
Chang-6
formation in Ansai oilfield has hish
content
of
acid
sensitive
minerals.The result of
acid
sensitivity
evaluation shows that it belongs
to
medium-weak
acid
sensitivity.So
for
a
long time acid treatment
WaS
considered
tO
have
no
feasibility.
On the
basis
of the abundant experimental studies,the organic acidizing field
test
is
performed,obtaining
a
good
result of stimulation.
This proves that the acid treatment is feasible in this reservoir.This paper anMyzes the defects in
acid
sensitivity standards from the
rock/
acid reaction
mechanism and
experimental
methods and points
out
existing
results
from
acid sensitivity evaluations
cannot
be
as the
judged
bases for
performing
acid treatment in this reservoir.
Key
Words:standard;sandstone;acidizing;organic
acid;evaluation
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(上接第757页)
文章编号:1001—3873(2008)06--0756一EA
Clay
Mineral
Analysis and
Some Problems
of Application
In Petroleum Geology
ZHAO Xing-yuan,HE Dong-bo
(Research
Institute
of
Petroleum Exploration
and Development,PetroChina,Beijing 100083,China)
Abstract:Clay mineral
analysis
has been widely applied in
the
studies of
petroleum
geology,exploitation,drilling and
production
engineering.In
clay
mineral
laboratory
experiments,it
is
a
systematic
procedure
from
sampling,pretreatment
to
analysis
and
identification.Any problem in the procedure
will cause
error or
incorrect understanding of given identified
results.This
paper
illustrates
such
possible
problems
and
offers corresponding
resolves.Taking
rock
diagenetic
stage division
and oil threshold
determination
aS
examples,this paper reveals the
practicable
conditions
and
application
limitation using the clay mineral
analysis
in
petroleum
geologic
study.
Key
Words:clay
mineral;analysis;identification;systematical
procedure;petroleum
geology;application
limitation
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